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Center for Memory and Recording Research
Formerly known as Center for Magnetic Recording Research

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H. Neal Bertram

Former CMRR Research Member

Research Interests


Professor Bertram's personal research involves analytic formulations of magnetic phenomena and recording system analysis. He is involved with reversal mechanisms in multilayer granular media focusing on reversal fields and thermal energy barriers. A long time continuing activity is the understanding of noise mechanisms in magnetic recording media. He is also engaged in analyzing the recording process in multilayer media focusing on the effective transition parameter and cross track correlation effects. Non-linear write transducer phenomena is also an interest. In addition, he performs system analysis by developing analytic formulations of error rate including all (stationary and non-stationary) noise mechanisms.

At CMRR Professor Bertram works with a variety of research groups on advanced recording projects. With Professor V. Lomakin he is engaged in numerical micromagnetic analysis of the dynamics of the recording process. With Professors Siegel and Wolf he contributes to system error rate analysis in advanced recording materials, such as patterned media. With Dr. Spada he is involved with experimental measurements of candidate recording media utilizing a "contact recording system".

In 1986 Dr. Bertram was an IEEE Distinguished Lecturer, and in 1987 he was named an IEEE Fellow. He has published a book titled Theory of Magnetic Recording (Cambridge University Press, March 1994) and to date, has authored/co-authored over 285 scientific papers. In 1999 he received the annual technical achievement award from INSIC (International Storage Industry Consortium).

Dr. Bertram won the 2003 IEEE Reynold B. Johnson Information Storage Award. The prize is awarded each year for outstanding achievement in the field of information storage, mainly computer storage. Dr. Bertram was cited for "fundamental and pioneering contributions to magnetic recording physics research." In May 2006 Dr. Bertram received the IEEE Magnetics Society 2006 Achievement Award for "contributions to the understanding of magnetic recording".

Biography

Dr. Bertram was born in Los Angeles. He received his B.A. from Reed College in Portland, OR in 1963, and his Ph.D. in Physics from Harvard University in Cambridge, MA in 1968.

From 1968 to 1985 he was employed as a member of the research department by the Ampex Corporation in Redwood City, CA. At first Dr. Bertram focused his research on magnetization reversal and general properties of particulate magnetic media. He developed models of the AC-biased recording process, generalized reciprocity, and saturation in write-transducers. He engaged in a variety of experimental studies of magnetic tape recording, focusing on high density signals and noise. Later he became involved in experimental studies of thin film disc media and the design of high frequency write pole tips.

In 1985 he joined the University of California at San Diego as an Endowed Chair Professor in the Electrical and Computer Engineering Department associated with the (then) newly created Center for Memory and Recording Research. At UCSD, Professor Bertram directed a research program in the physics of magnetic recording, including studies of polycrystalline thin film media, write and read transducers, fine particle tape systems and general analyses of ultimate limits in ultra high density recording. Specific studies involved: high speed dynamic magnetization reversal, effects of thermal excitation and fundamentals of dynamic relaxation. In these areas, his Ph.D. students engaged in both experimental and theoretical studies of basic issues in high density magnetic recording, including noise phenomena, nonlinearities, dynamic processes, thermally induced relaxation and large scale numerical simulations of high density magnetic recording. Dr. Bertram created graduate courses in magnetic recording theory, analysis of recording materials and magnetic recording measurements.

In 1986 Dr. Bertram was an IEEE Distinguished Lecturer, and in 1987 he was named an IEEE Fellow. He has published a book titled Theory of Magnetic Recording (Cambridge University Press, March 1994) and to date, has authored/co-authored over 285 scientific papers. In 1999 he received the annual technical achievement award from INSIC (International Storage Industry Consortium).

Dr. Bertram won the IEEE Reynold B. Johnson Information Storage Award. The prize is awarded each year for outstanding achievement in the field of information storage, mainly computer storage. Dr. Bertram was cited for "fundamental and pioneering contributions to magnetic recording physics research." In May 2006 Dr. Bertram received the IEEE Magnetics Society 2006 Achievement Award for "contributions to the understanding of magnetic recording."

In November 2004, Dr. Bertram retired from formal teaching and the chaired position he held for 20 years. Currently he devotes 25% of his time to CMRR projects working with students and professors. Fields of study include analytic modeling of bit error rate in high density systems, dynamic reversal processes in advanced media, analytic micromagnetic analysis of composite media and "in contact" magnetic recording measurements. He was a part-time consultant at Hitachi Research Labs in San Jose, CA. from 2004 to April 2009. He is currently a consultant with Western Digital in San Jose, CA.

Dr. Bertram and his wife Ann have a son, Seth. Dr. Bertram has had a life-long interest in music. He plays the cello, participates in numerous musical groups and gives concerts on occasion.

Projects

  • Energy barriers and thermal effects in multilayer and patterned media
  • Numerical micromagnetics in multilayer and patterned media
  • Record process modeling in multilayer and patterned media
  • Error rate analysis in recording systems
  • Rise time phenomena in high data rate recording heads
  • GMR noise analysis
  • Analysis of experimental studies of recording phenomena on both spin stand and quasi stationary contact testers.

Publications

Introduction to Magnetic Materials and Magnetic Recording - Short Course 2009

    1967 - 1980
  1. "Magnetoelastic Interaction in EulG", H. N. Bertram and R. V. Jones, J. Appl. Phys., 38(3), p. 1224-1225, (March 1967). [PDF UCSD only]
  2. "Theoretical Coercivity Field for an Interacting Anisotropic Dipole Pair of Arbitrary Bond Angle", H. N. Bertram and J. C. Mallinson, J. Appl. Phys., 40, p. 1301-1302, (March 1969). [PDF UCSD only]
  3. Switching Dynamics for an Interacting Anisotropic Dipole Pair of Arbitrary Bond Angle", H. N. Bertram and J. C. Mallinson, J. Appl. Phys., 41, p. 1102-1104, (March 1970). [PDF UCSD only]
  4. Monte Carlo Calculation of Magnetic Anhysteresis", H. N. Bertram, J. de Physique, 32, p. 684-685, (1971). [PDF UCSD only]
  5. "A Theory of Contract Printing", J. C. Mallinson, H. N. Bertram and C. W. Steele, IEEE Trans. Magn., 7, p. 524-527, (September 1971). [PDF UCSD only]
  6. "Imaging Effects in Anisotropic Contact Duplication", H. N. Bertram, AIP Conf. Proc., 10, p. 1440-1444, (1972).
  7. "Anisotropy of Well Oriented g-Fe2O3 Magnetic Tape", H. Neal Bertram, AIP Conf. Proc. 18, p. 1113-1117, (1973).
  8. "Write Processes in High Density Recording", J. C. Mallinson and H. N. Bertram, IEEE Trans. Magn., 9(3), p. 329-331, (September 1973). [PDF UCSD only]
  9. "The Effect of Interactions on the Saturation Remanence of Particulate Assemblies", H. N. Bertram and A. K. Bhatia, IEEE Trans. Magn., 9(2), p. 127-133, (June 1973). [PDF UCSD only]
  10. "Long Wavelength AC Bias Recording Theory", H. N. Bertram. IEEE Trans. Magn., 10(4), p. 1039-1048, (December 1974). [PDF UCSD only]
  11. "On the Convergence of Iterative Solutions of the Integral Magnetic Field Equation", H. N. Bertram, IEEE Trans. Magn., 11(3), p. 928-933, (May 1975). [PDF UCSD only]
  12. "Wavelength Response in AC Biased Recording", H. N. Bertram, IEEE Trans. Magn., 11(5), p. 1176-1178, (September 1975). [PDF UCSD only]
  13. "A Theory of Eddy Current Limited Heads", H. N. Bertram and J. C. Mallinson, IEEE Trans. Magn., 12(6), p. 713-715, (November 1976). [PDF UCSD only]
  14. "Pole Tip Saturation in Magnetic Recording Heads", H. N. Bertram and C. W. Steele, IEEE Trans. Magn., 12(6), p. 702-706, (November 1976). [PDF UCSD only]
  15. "Anisotropic Reversible Permeability Effects in the Magnetic Reproduce Process", H. N. Bertram, IEEE Trans. Magn., 14(3), p. 111-118, (May 1978). [PDF UCSD only]
  16. "A Generalized Formula for Induced Magnetic Flux in a Playback Head", T. Wessel-Berg and H. N. Bertram, IEEE Trans. Magn., 14(3), p. 129-131, (May 1978). [PDF UCSD only]
  17. "The Effect of Pole-Tip Saturation on the Performance of a Recording Head", R. F. M. Thornley and H. N. Bertram, IEEE Trans. Magn., 14(5), p. 430-432, (September 1978). [PDF UCSD only]
  18. "The Effect of Demagnetization Fields on Recording Spectra", H. N. Bertram and R. Neidermeyer, IEEE Trans. Magn., 14(5), p. 743-745, (September 1978). [PDF UCSD only]
  19. "Recording Media Archival Attributes (Magnetic)", H. N. Bertram and A. Eshel, Report F30602-78-C-0181, United States Air Force, AFSC Rome Air Development Center, (1979).
  20. "The Print-Through Phenomenon and its Practical Consequences", H. N. Bertram, M. K. Stafford and D. R. Mills, J. of the Audio Engineering Society, 28(19), p. 690-705, (October 1980).

  21. 1981 - 1990
  22. "Dependence of Reproducing Gap Null on Medium Permeability and Spacing", H. N. Bertram and D. L. Lindholm, IEEE Trans. Magn., 18(3), p. 893-897, (May 1982). [PDF UCSD only]
  23. "Kinetics of the Humid Aging of Magnetic Recording Tape", H. N. Bertram and E. F. Cuddihy, IEEE Trans. Magn., 18(5), p. 993-999, (September 1982). [PDF UCSD only]
  24. "The Effect of Spacing on Demagnetization in Magnetic Recording", H. N. Bertram and R. Niedermeyer, IEEE Trans. Magn., 18(6), p. 1206-1208, (November 1982). [PDF UCSD only]
  25. "Amplitude and Bit Shift Spectra Comparisons in Thin Metallic Media", H. N. Bertram and L. D. Fielder, IEEE Trans. Magn., 29(5), p. 1605-1607, (September 1983). [PDF UCSD only]
  26. "Monte Carlo Simulation of Particulate Noise in Magnetic Recording", R. A. Arratia and H. N. Bertram, IEEE Trans. Magn., 20 (2), p. 412-420, (March 1984). [PDF UCSD only]
  27. "A Theoretical and Experimental Comparison of the Longitudinal and Vertical Modes of Magnetic Recording", J. C. Mallinson and H. N. Bertram, IEEE Trans. Magn., 20(3), p. 461-467, (May 1984). [PDF UCSD only]
  28. "Geometric Effects in the Magnetic Recording Process", H. N. Bertram, IEEE Trans. Magn., 20 (3), p. 468-478, (May 1984). [PDF UCSD only]
  29. "On the Characteristics Pole-Keeper Head Fields", J. C. Mallinson and H. N. Bertram, IEEE Trans. Magn., 20(5), p. 721-723, (September 1984). [PDF UCSD only]
  30. "The Effect of the Angular Dependence of the Particle Nucleation Field on the Magnetic Recording Process", H. N. Bertram, IEEE Trans. Magn., 20(6), p. 2094-2104, (November 1984). [PDF UCSD only]
  31. "On the Magnetization Reversal Process in CoCr Recording Media", H. N. Bertram and S. Shtrikman, J. of Magn. and Magn. Mater., 45, p. 88-90, (November 1984). [PDF UCSD only]
  32. "Interpretation of Spectral Response in Perpendicular Recording", H. N. Bertram, IEEE Trans. Magn., 21(5), p. 1395-1397, (September 1985). [PDF UCSD only]
  33. "The Magnetic Limits of Magnetic Recording", H. N. Bertram, Proc. of SMART Conference (May), San Jose, CA, (1986).
  34. "Fundamentals of the Magnetic Recording Process", H. N. Bertram, Proc. IEEE, 74(11), p. 1494-1512, (November 1986). [PDF UCSD only]
  35. "DC Modulation Noise in Thin Metallic Media and its Application for Head Efficiency Measurement", H. N. Bertram, K. Hallamasek and M. Madrid, IEEE Trans. Magn., 22(4), p. 247-252, (July 1986). [PDF UCSD only]
  36. "Computer Modeling for the Write Process in Perpendicular Recording", J-G. Zhu and H. N. Bertram,. IEEE Trans. Magn., 22(5), p. 379-381, (September 1986). [PDF UCSD only]
  37. "Particle Interaction Phenomena", H. N. Bertram. IEEE Trans. Magn., 22(5), p. 460-465, (September 1986). [PDF UCSD only]
  38. "Depth Profiling of Modulation Noise", J-M. Coutellier and H. N. Bertram, IEEE Trans. Magn., 23(1), p. 195-197, (January 1987). [PDF UCSD only]
  39. "Comparison of Thin-Film and Ring Heads for Perpendicular Recording", J-G. Zhu and H. N. Bertram, IEEE Trans. Magn., 23(1), p. 177-179, (January 1987). [PDF UCSD only]
  40. "Transition Noise Model for Longitudinal Thin-Film Media", A. Barany and H. N. Bertram, IEEE Trans. Magn., 23(2), p. 1776-1787, (1987). [PDF UCSD only]
  41. "Effective Volume of Interacting Particles", D. Rode, H. N. Bertram and D. R. Fredkin, IEEE Trans. Magn., 23(5), p. 2224-2226, (1987). [PDF UCSD only]
  42. "Computer Simulation of Nonlinear Bit Shift in Perpendicular Recording", J-G. Zhu and H. N. Bertram, IEEE Trans. Magn., 23(5), p. 2862-2864, (1987). [PDF UCSD only]
  43. "A Simple Iterative Model of Perpendicular Recording", C. M. Perlov and H. N. Bertram, IEEE Trans. Magn., 23(5), p. 2859-2861, (1987). [PDF UCSD only]
  44. "Transition Position and Amplitude Fluctuation Noise Model for Longitudinal Thin-Film Media", A. Barany and H. N. Bertram, IEEE Trans. Magn., 23(5), p. 2374-2376, (1987). [PDF UCSD only]
  45. "Imaging Effects in Contact Recording on Particulate Media", I. A. Beardsley and H. N. Bertram, IEEE Trans. Magn., 23(6), p. 3922-3926, (1987). [PDF UCSD only]
  46. "Micromagnetic Studies of Thin Metallic Films", J-G. Zhu and H. N. Bertram, J. Appl. Phys., 63(8), 3248-3253, (1988). (Invited) [PDF UCSD only]
  47. "Ferromagnetic Switching in Elongated g-Fe2O3 Particles", M. E. Schabes and H. N. Bertram, J. Appl. Phys., 64, p. 5832-5834, (1988). [PDF UCSD only]
  48. "Recording and Transition Noise Simulations in Thin-Film Media", J-G. Zhu and H. N. Bertram, IEEE Trans. Magn., 24(6), p. 2706-2708, (1988). [PDF UCSD only]
  49. "Magnetization Processes in Ferromagnetic Cubes", M. E. Schabes and H. N. Bertram, J. Appl. Phys., 64, p. 1347-1357, (1988). [PDF UCSD only]
  50. "The Recording Process in Longitudinal Particulate Media", H. N. Bertram and I. A. Beardsley, IEEE Trans. Magn., 246), p. 3234-3248, (1988). [PDF UCSD only]
  51. "Transition Noise Study in Oriented Longitudinal Thin-Films", J-G. Zhu and H. N. Bertram, Presented at International Magnetics Conference, Washington,D.C., March 28-31, (1989). [PDF UCSD only]
  52. "Transition Noise Study in Oriented Longitudinal Thin-Films", J-G. Zhu and H. N. Bertram, Digest, INTERMAG 1989, p. BA-9, (March). [PDF UCSD only]
  53. "DC Modulation Noise and Demagnetizing Fields in Thin Metallic Media", G.Tarnopolsky, L. Tran, A. Barany, N. Bertram and D. Bloomquist, IEEE Trans. Magn., 25(4), p. 3160-3165, (1989). [PDF UCSD only]
  54. "Effects of Applied Field Inhomogeneities on the Magnetization Reversal of Elongated g-Fe2O3 Particles", M. E. Schabes and H. N. Bertram, Digest, INTERMAG 1989, p. EP-11, (March), IEEE Trans. Magn., 25(5), p. 3662-3664, (1989). [PDF UCSD only]
  55. "Magnetization Reversal in CoCr Perpendicular Thin-Films", J-G. Zhu and H. N. Bertram, J. Appl. Phys. 66(3), p. 1291-1307, (1989). [PDF UCSD only]
  56. "Characterization of Head Saturation", D. Rode and H. N. Bertram, IEEE Trans. Magn., 25(1), p. 703-709, (1989). [PDF UCSD only]
  57. "Magnetization Reversal of Cobalt Modified g-Fe2O3 Particles", M. E. Schabes and H. N. Bertram, J. Appl. Phys., 67(9), p. 5149-5151, (1990). [PDF UCSD only]
  58. "Magnetization Fluctuations in Uniformly Magnetized Thin-Film Recording Media", T. J. Silva and H. N. Bertram, IEEE Trans. Magn., 26(6), p. 3129-3139, (1990). [PDF UCSD only]
  59. "Study of Noise Sources in Thin-Film Media", J-G. Zhu and H. N. Bertram, Digest, INTERMAG 1990, p. EB-07, (April), IEEE Trans. Magn., 26(5), p. 2140-2142, (1990). [PDF UCSD only]

  60. 1991 - 1995
  61. "Self-Organized Behavior in Thin-Film Recording Media", J-G. Zhu and H. N. Bertram, J. Appl. Phys., 69(8), p. 4709-4711, (1991). [PDF UCSD only]
  62. "Reversal Mechanisms and Domain Structures in Thin-Film Recording Media", J-G. Zhu and H. N. Bertram, J. Appl. Phys., 69(8), p. 6084-6089, (1991). (Invited) [PDF UCSD only]
  63. "Domain-Wall Dynamic Instability", S. W. Yuan and H. N. Bertram, J. Appl. Phys., 69(8), p. 5874-5876, (1991). [PDF UCSD only]
  64. "Magnetization Fluctuations and Characteristic Lengths for Sputtered CoP/Cr Thin-Film Media", G. J. Tarnopolsky, H. N. Bertram, and L. T. Tran, J. Appl. Phys., 69(9), p. 4730-4732, (1991). [PDF UCSD only]
  65. "Domain Wall Structures and Dynamics in Thin-Films", S. W. Yuan and H. N. Bertram, IEEE Trans. Magn., 27(6), p. 5511-5513, (1991). [PDF UCSD only]
  66. "Domain-Wall Dynamic Transitions in Thin-Films", S. W. Yuan and H. N. Bertram, Phys. Rev. B-Condensed Matter, 44(22), p. 12395-12405, (1991). [PDF UCSD only]
  67. "Statistical Data Analysis of Magnetic Recording Noise Mechanisms", S. W. Yuan and H. N. Bertram, IEEE Trans. Magn., 28(1), p. 84-92, (1992). [PDF UCSD only]
  68. "A Simple Statistical Model of Partial Erasure in Thin-Film Disk Magnetic Recording Systems", R. D. Barndt, A. J. Armstrong, H. N. Bertram, and J. K. Wolf, IEEE Trans. Magn., 27(6), p. 4978-4980, (1991). [PDF UCSD only]
  69. "Simulations of Torque Measurements and Noise in Thin-Film Magnetic Recording Media", H. Neal Bertram and J-G Zhu, IEEE Trans. Magn., 27(6), p. 5043-5045, (1991). [PDF UCSD only]
  70. "Magnetization Structures in Thin-Film Recording Media", J-G. Zhu and H. N. Bertram, IEEE Trans. Magn., 27(5), p. 3553-3562, (1991). [PDF UCSD only]
  71. "Modeling the Effect of Head Saturation in High Density Tape Recording", D. Wachenschwanz and H. N. Bertram, IEEE Trans. Magn., 27(6), p. 4981-4983, (1991). [PDF UCSD only]
  72. "Nonlinear Effects in High-Density Tape Recording", A. J. Armstrong, H. N. Bertram, R. D. Barndt, and J. Wolf, IEEE Trans. Magn., 27(5), p. 4366-4376, (1991). [PDF UCSD only]
  73. "Fundamental Magnetization Processes in Thin Film Recording Media", H. N. Bertram and J-G. Zhu, in Solid State Physics Review, Vol. 46, p. 271-371, eds. H. Ehrenreich and D. Turnbull, Academic Press, 1992.
  74. "Magnetization Correlations and Noise in Thin Film Recording Media", H. Neal Bertram and R. Arias, J. Appl. Phys. 71(7), p. 3439-3454, (1992). [PDF UCSD only]
  75. "Magnetic Thin Film Domain Wall Motion Under Dynamic Fields", S. W. Yuan and H. N. Bertram, J. Appl. Phys. 72(3), p. 1033-1038, (1992). [PDF UCSD only]
  76. "Experimental Studies of Nonlinearities in High Density Disk Recording", H. G. Lin, R. Barndt, H. N. Bertram, and J. K. Wolf, Digest, INTERMAG 1992, p. 483, (April), IEEE Trans. Magn., 28(5), p. 3279-3281, (1992). [PDF UCSD only]
  77. "Phenomenology of dM Curves and the Magnetic Interactions", X. Che and H. N. Bertram, J. Magn. Magn. Mater., 116(1-2), p. 21-127, (1992). [PDF UCSD only]
  78. "Energy Barriers for Thermal Reversal of Interacting Single Domain Particles", W. Chen, S. Zhang and H. N. Bertram. J. Appl. Phys. 71(11), p. 5579-5584, (1992). [PDF UCSD only]
  79. "Size Effects of Switching Fields of Thin Permalloy Particles", S. W. Yuan, H. N. Bertram, J. F. Smyth, and S. Schultz. Digest, INTERMAG 1992, p. 432, (April). IEEE Trans. Magn., 28(5), p. 3171-3173, (1992). [PDF UCSD only]
  80. "Inhomogeneities and Coercivity of Soft Permalloy Thin Films", S. W. Yuan and H. Neal Bertram, Digest, INTERMAG 1992, p. 335, (April), IEEE Trans. Magn., 28(5), p. 2916-2918, (1992). [PDF UCSD only]
  81. "Fast Adaptive Algorithms for Micromagnetics", S. W. Yuan and H. N. Bertram, IEEE Trans. Magn., 28(5), p. 2031-2036, (1992). [PDF UCSD only]
  82. "Disorder and Coercivity in Magnetic Particle Systems", Y. Zhao and H. N. Bertram, J. Magn. Magn. Mater., 144(3), p. 329-335, (1992). [PDF UCSD only]
  83. "Improved Calibration Techniques for High Density Tape Recording System", I. A. Beardsley, A. Armstrong, and H. N. Bertram, IEEE Trans. Magn., 28(6), p. 3417-3422, (1992). [PDF UCSD only]
  84. "Theory of Nonlinearities and Pulse Asymmetry in High Density Tape Recording", H. N. Bertram, A. J. Armstrong, J. K. Wolf, and I. Beardsley, Digest, INTERMAG 1992, p. 248, (April), IEEE Trans. Magn., 28(5), p. 2701-2706, (1992). (Invited) [PDF UCSD only]
  85. "Dynamics of nonlinearities in high density recording", X. Che and H. N. Bertram, IEEE Trans. Magn., 29(1), p. 317-323, (January 1993). [PDF UCSD only]
  86. "Fields and Transforms for Thin Film Heads", G. A. Bertero, H. N. Bertram and D. M. Barnett, IEEE Trans. Magn., 29(1), p. 67-76, (January 1993). [PDF UCSD only]
  87. "General analysis of noise in recorded transitions in thin-film recording media", H. N. Bertram and X. Che, IEEE Trans. Magn., 29(1), p. 201-208, (January 1993). [PDF UCSD only]
  88. "Ultra high density recording for magnetoresistive heads", S. W. Yuan and H. N. Bertram, Digest, INTERMAG 1993, p. CA-02, (April 1993). [PDF UCSD only]
  89. "Magnetization correlations in thin film media in the presence of a recorded transition", H. N. Bertram, I. A. Beardsley and X. Che. J. Appl. Phys., 73(10), p. 5545-5547, (May 1993). [PDF UCSD only]
  90. "Noise analysis and image focusing for magnetic force microscopy", X. Che, M. Lederman, G. A. Gibson, H. N. Bertram, and S. Schultz, J. Appl. Phys., 73(10), p. 5805-5807, (May 1993). [PDF UCSD only]
  91. "Domain wall dynamics in thick permalloy films", S. W. Yuan and H. N. Bertram, J. Appl. Phys, 73(10), p. 5992-5994, (May 1993). [PDF UCSD only]
  92. "Study of magnetic recording transitions at very low flying heights", X. Che and H. N. Bertram, J. Appl. Phys, 73(10), p. 6004-6006, (May 1993). [PDF UCSD only]
  93. "Micromagnetics of small unshielded MR elements", S. W. Yuan and H. N. Bertram, J. Appl. Phys, 73(10), p. 6235-6237, (May 1993). [PDF UCSD only]
  94. "Micromagnetic modeling of a dual magnetoresistive head", H. Smith, S. Yuan and H. N. Bertram, Digest, TMRC 1993, p. O-54, (Sept 1993). [PDF UCSD only]
  95. "Overwrite in thin film disk recording systems", G. H. Lin, Y. Zhao and H. N. Bertram, IEEE Trans. Magn., 29(6), p. 4215-4223, (November 1993). [PDF UCSD only]
  96. "Eddy current damping of thin film domain walls", S. W. Yuan and H. N. Bertram, Digest, INTERMAG 1993, p. AC-05, (April), IEEE Trans. Magn., 29(6), p. 2515-2517, (November 1993). [PDF UCSD only]
  97. "Experimental studies of noise autocorrelation in thin film media", G. H. Lin and H. N. Bertram, Digest, INTERMAG 1993, p. FB-01, (April), IEEE Trans. Magn., 29(6), p. 3697-3699, (November 1993). [PDF UCSD only]
  98. "Nonlinearities and noise in perpendicular dibit recording", X. Che and H. N. Bertram, IEEE Trans. Magn., 29(6), p. 3739-3741, (November 1993). [PDF UCSD only]
  99. "Magnetoresistive heads for ultra high density recording", S. W. Yuan and H. N. Bertram, IEEE Trans. Magn., 29(6), p. 3811-3816, (November 1993). (Invited) [PDF UCSD only]
  100. "Biasing characteristics of unshielded, boundary exchange-coupled SAL/MR sensors", S. H. Laio, S. W. Yuan and H. N. Bertram, Digest, INTERMAG 1993, p. GP-06, (April), IEEE Trans. Magn., 29(6), p. 3873-3875, (November 1993). [PDF UCSD only]
  101. "Studies of nonlinear bit shift and partial erasure using pseudo-random sequence", X. Che, H. N. Bertram, and M. K. Bhjattacharyya, Digest, INTERMAG 1993, p. EC-01, (April), IEEE Trans. Magn., 29(6), p. 3972-3974, (November 1993). [PDF UCSD only]
  102. "PRML performance estimation considering medium noise down track correlations", X. Che, L. C. Barbosa, and H. N. Bertram, Digest, INTERMAG 1993, p. GQ-13, (April), IEEE Trans. Magn., 29(6), p. 4062-4064, (November 1993). [PDF UCSD only]
  103. "Theory of Magnetic Recording", H. Neal Bertram, Cambridge University Press, England, 1994. [Order Information]
  104. "The Physics of Magnetic Recording", H. Neal Bertram, in Applied Magnetism, p. 1-38, eds. R. Gerber, C. D. Wright and G. Asti, Kluwer Academic Publishers, 1994.
  105. "Cross-track characteristics of shielded MR heads", S. W. Yuan, H. N. Bertram and M. Bhattacharyya, IEEE Trans. Magn., 30(2), p. 381-387, (March 1994). (Invited) [PDF UCSD only]
  106. "Micromagnetic studies of medium noise mechanisms", X. Che and H. N. Bertram, J. Appl. Phys., 75(10), p. 6779-6781, (May 1994). [PDF UCSD only]
  107. "Nonuniform switching of single domain particles at finite temperatures", H-B. Braun and H. N. Bertram, J. Appl. Phys., 75(9), p. 4609-4616, (May 1994). [PDF UCSD only]
  108. "Noise correlations in dibit recording", H. G. Lin, H. N. Bertram and R. Simmons, J. Appl. Phys., 75(10), p. 5765-5767, (May 1994). [PDF UCSD only]
  109. "Micromagnetics of GMR spin-valve heads", S. W. Yuan and H. N. Bertram, J. Appl. Phys., 75(10), p. 6385-6387, (May 1994). [PDF UCSD only]
  110. "Off-track spacing loss of shielded MR heads", S. W. Yuan and H. N. Bertram, IEEE Trans. Magn., 30(3), p. 1267-1273, (July 1994). [PDF UCSD only]  Correction:[PDF UCSD only]
  111. "A Simplified model of high density tape recording", D. Wei, H. N. Bertram, and F. Jeffers, IEEE Trans. Magn., 30(5), p. 2739-2749, (September 1994). [PDF UCSD only]
  112. "Transition noise analysis of thin film magnetic recording media", B. Slutsky and H. N. Bertram, IEEE Trans. Magn., 30(5), p. 2808-2817, (September 1994). [PDF UCSD only
  113. "Transition noise spectral measurements in thin film media", G. H. Lin and H. N. Bertram, IEEE Trans. Magn., 30(6), p. 3987-3989, (November 1994). [PDF UCSD only]
  114. "The relationship of medium noise to system error rate in a PRML channel", J. Fitzpatrick, H. N. Bertram, X. Che, L. C. Barbosa and G. H. Lin, IEEE Trans. Magn., 30(6), p. 3990-3995, (November 1994). [PDF UCSD only](Invited)
  115. "The effect of MR head geometry on playback pulse shape and spectra", E. Champion and H. N. Bertram, IEEE Trans. Magn., 31(4), p. 2461-2470, (1995). [PDF UCSD only]
  116. "Micromagnetic modeling of magnetic anisotropy in textured thin-film media", Y. Zhao and H. N. Bertram, J. Appl.. Phys., 77(12), p. 6411-6415, (1995). [PDF UCSD only]
  117. "Linear signal analysis of shielded AMR and spin Valve Heads", H. N. Bertram, IEEE Trans. Magn., 31(6), p. 2573-2578, (1995). (Invited) [PDF UCSD only]
  118. "Micromagnetic and experimental studies of CoPtCr polycrystalline thin film media with bicrystal microstructure", Q. Peng, H. N. Bertram, M. Doerner, S. Lambert, M. Mirzamaani, N. Fussing and D. Margulies, IEEE Trans. Magn., 31(6), p. 2821-2823, (1995). [PDF UCSD only]
  119. "The Effect of interface dispersion on noise and Hysteresis in permanent magnet stabilized MR elements", E. Champion and H. N. Bertram, IEEE Trans. Magn., 31(6), p. 2642-2644, (1995). [PDF UCSD only]
  120. "Modeling and analysis of overwrite in thick particulate media", D. Wei, A. Friedmann, H. N. Bertram and R. Dee, IEEE Trans Magn., 31(6), p. 2898-2900, (1995). [PDF UCSD only]

  121. 1996 - 2000
  122. "Notes on the Problem of Magnetization Reversal", R. Arias, H. N. Bertram and H. Suhl, in Nonlinear Microwave Signal Processing: Towards a New Range of Devices, p. 3-11, eds., R. Marcelli and S. A. Nikitov, Kluwar Academic Publishers, 1996. [PDF UCSD only]
  123. "Hysteresis and Baseline Shift in Permanent Magnet Stabilized MR/SAL Heads", E. Champion and H. N. Bertram, . Digest, TMRC 1995, p. A-1, (July), IEEE Trans. Magn., 30(1), p. 13-18, (1996). (Invited) [PDF UCSD only]
  124. "Evolution of Bicrystal Media Development", G-L. Chen, J. K. Chang, Q. Chen, Q. Peng, Z-H. Lin, E. Yen, G-L. Chen, H. N. Bertram and R. Sinclair, Digest, TMRC 1996, p. A-4, (August). [PDF UCSD only]
  125. "Scanning Magneto-Resistance Microscopy (SMRM) as a Diagnostic for High Density Recording", S. Y. Yamamoto, S. Schultz, and H. N. Bertram, Digest, TMRC 1996, p. B-2, (August). [PDF UCSD only]
  126. "Texture Induced Noise and its Impact on System Performance", G. H. Lin, X. Xing, K. E. Johnson and H. N. Bertram, Digest, TMRC 1996, p. E-1, (August). [PDF UCSD only]
  127. "Micromagnetic Studies of Inhomogeneous CoPtCr Bicyrstal Thin Film Media", Q. Peng and H. N. Bertram, J. Appl. Phys., 79(8), p. 916-4918, (1996). [PDF UCSD only]
  128. "Experimental Analysis of the Effects of Tape Thickness on Magnetic Recording", A. Friedmann, D. Wei, H. N. Bertram, J. K. Wolf, R. Swanson and F. Jeffers, J. Appl. Phys. 79(8), p. 5658-5660, (1996). [PDF UCSD only]
  129. "Signals and Nonlinearities in Thin Metal-Particle Tape", D. Wei, H. N. Bertram and A. Friedmann, J. Appl. Phys. 79(8), p. 5661-5663, (1996). [PDF UCSD only]
  130. "Experimental Studies of Nonlinearities in MR Head", X. Xing and H. N. Bertram, J. Appl. Phys.79(8), p. 5883-5885, (1996). [PDF UCSD only]
  131. "Interlayer Coupling and Surface Roughness in GMR Spin Valve Structures", D. Wei and H. N. Bertram, IEEE Trans. Magn., 32(5), p. 3434-3436, (1996). [PDF UCSD only]
  132. "Pulse Distortion in MR and GMR Playback Heads", E. Champion and H. N. Bertram, IEEE Trans. Magn., 32(5), p. 3452-3454, (1996). [PDF UCSD only]
  133. "Micromagnetic Studies of Microstructural Dependence of Track Edge Recording on Signal and Nonlinearities in Longitudinal Thin Film Media", Q. Peng and H. N. Bertram, IEEE Trans. Magn., 32(5), p. 3566-3568, (1996). [PDF UCSD only]
  134. "Effect of Substrate Texture on Thin Film Disk Noise", X. Xing, G. H. Lin, K. E. Johnson and H. N. Bertram, IEEE Trans. Magn., 32(5), p. 3575-3577, (1996). [PDF UCSD only]
  135. "Across-The-Track Performance of Dual Stripe Magnetoresistive Heads", R. J. Davidson, R. F. Simmons, E. Champion, H. N. Bertram and S. H. Charap, IEEE Trans. Magn., 32(5), p. 3929-3931, (1996). [PDF UCSD only]
  136. "Measurements of Crystalline Anisotropy of Longitudinal Media", J. K. Chang, Q. Peng, H. N. Bertram and R. Sinclair, IEEE Trans. Magn., 32(5), p. 4902-494, (1996). [PDF UCSD only]
  137. "Tiny grains and giant magnetoresistance: Numerical micromagnetics", H. N. Bertram and C. Seberino, in Gather/Scatter, San Diego Supercomputer Center Publication, vol. 13, no. 2, p. 4-5, (1997). [PDF UCSD only]
  138. "Fast thermal reversal of magnetic particles", R. Arias and H. N. Bertram, J. Magn. Magn. Mater. 171, p. 209-217, (1997). [PDF UCSD only]
  139. "Micromagnetic studies of switching speed in longitudinal and perpendicular polycrystalline thin film recording media at ultra high densities", Q. Peng and H. N. Bertram, J. Appl. Phys., 81(8), p. 4384-4386, (1997). [PDF UCSD only]
  140. "Micromagnetic Simulations with Eddy Currents of Rise Time in Thin Film Write Heads", G. M. Sandler and H. N. Bertram, J. Appl. Phys, 81(8), p. 4513-4515, (1997). [PDF UCSD only]
  141. "PW50, D50 and playback voltage formulae for shielded MR heads", Y. Zhang and H. N. Bertram, J. Appl. Phys, 81(8), p. 4897-4899, (1997). [PDF UCSD only]
  142. "Overwrite in particulate tape media", D. Wei, H. N. Bertram, and R. H. Dee, IEEE Trans. Magn., 33(1), p. 836-843, (1997). [PDF UCSD only]
  143. "Texture induced noise and its impact on system performance", G. H. Lin, X. Xing, K. E. Johnson and H. N. Bertram, IEEE Trans. Magn., 33(1), p. 950-955, (1997). (Invited) [PDF UCSD only]
  144. "Evolution of bicrystal media development", G-L. Chen, J. K. Chang, Q. Chen, Q. Peng, Z-H. Lin, E. Yen, G-L. Chen, H. N. Bertram and R. Sinclair, IEEE Trans. Magn., 33(2), p. 885-890, (1997). (Invited) [PDF UCSD only]
  145. "Scanning magneto-resistance microscopy (SMRM) as a diagnostic for high density recording", S. Y. Yamamoto, S. Schultz, Y. Zhang and H. N. Bertram, IEEE Trans. Magn., 33(2), p. 891-896, (1997). [PDF UCSD only]
  146. "Playback pulse shape and spectra for shielded MR heads", Y. Zhang, S. Shtrikman and H.N. Bertram, IEEE Trans. Magn. 33(2), p. 1093-1103, (1997). [PDF UCSD only]
  147. "Micromagnetic studies of recording dynamics and switching speed in longitudinal thin film media", Q. Peng and H. N. Bertram, Digest, INTERMAG 1997, p. ET-03, (April), IEEE Trans. Magn., 33(5), p. 2677-2679, (1997). [PDF UCSD only]
  148. "Micromagnetic studies of disk drive servo performance for ultra-high density magnetic recording", E. Champion, R. J. Kadlec and H. N. Bertram, Digest, INTERMAG 1997, p. ET-04, (April), IEEE Trans. Magn., 33(5), p. 2680-2682, (1997). [PDF UCSD only]
  149. "Dynamics of reversal in nonuniformly magnetized single particles with thermal noise", E. D. Boerner and H. N. Bertram, Digest, INTERMAG 1997, p. BB-04, (April). [PDF UCSD only]
  150. "Micromagnetics of needlelike particles", C. Seberino and H. N. Bertram, Digest, INTERMAG 1997, p. BB-05, (April). [PDF UCSD only]
  151. "Analysis of transition noise in thin film media", X. Xing and H. N. Bertram, Digest, INTERMAG 1997, p. AB-08, (April), IEEE Trans. Magn., 33(5), p. 2959-2961, (1997). [PDF UCSD only]
  152. "Dynamics of thermally activated reversal in nonuniformly magnetized single particles", E. D. Boerner and H. N. Bertram, IEEE Trans. Magn., 33(5), p. 3052-3054, (1997). [PDF UCSD only]
  153. "Micromagnetics of long ferromagnetic particles", C. Seberino and H. N. Bertram, IEEE Trans. Magn., 33(5), p. 3055-3057, (1997). [PDF UCSD only]
  154. "Magnetization distribution in thin films with perpendicular surface anisotropy", H. N. Bertram and David I. Paul, J. Appl. Phys. 82(5), p. 2439-2446, (1997). [PDF UCSD only]
  155. "Localized Surface Nucleation of Magnetization Reversal", H. Suhl and H. N. Bertram, J. Appl. Phys, 82(12), p. 6128-6137, (1997). [PDF UCSD only]
  156. "Multigrid methods for computation of demagnetization fields in magnetic recording problems", I. A. Tsukerman, A. Plaks and H. N. Bertram, Abstract, 7th Joint MMM-INTERMAG Conference (January), p. 50, (1998). [PDF UCSD only]
  157. "Numerical simulations of the effect of record field pulse length on medium coercivity at finite temperatures", H. N. Bertram and Q. Peng, Abstract, 7th Joint MMM-INTERMAG Conference, p. 11, (January), IEEE Trans. Magn. 34(4), p. 1543-1545, (1998). [PDFUCSD only]
  158. "Non-arrhenius behavior in single domain particles", E. D. Boerner and H.N. Bertram, Abstract, 7th Joint MMM-INTERMAG Conference, p. 201, (January), IEEE Trans. Magn. 34(4), p. 1678-1680, (1998). [PDF UCSD only]
  159. "Signal to noise ratio scaling and density limit estimates in longitudinal magnetic recording", H. N. Bertram, H. Zhou and R. Gustafson, IEEE Trans. Magn. 34(4), p. 1845-1847, (1998). [PDF UCSD only]
  160. "A theoretical study of nonlinear transition shift", Y. Zhang and H. N. Bertram, IEEE Trans. Magn. 34(4), p. 1955-1957, (1998). [PDF UCSD only]
  161. "Thermal decay in high density disk media", Y. Zhang and H. N. Bertram, IEEE Trans. Magn., 34(5), p. 3786-3793, (1998). [PDF UCSD only]
  162. "Multigrid methods for computation of magnetostatic fields in magnetic recording problems", I. Tsukerman, A. Plack and H. N. Bertram, J. Appl. Phys. 83(11), p. 6344-6346, (1998). [PDF UCSD only]
  163. "Numerical simulations of hysteresis in longitudinal magnetic tape", H. N. Bertram and C. Seberino, J. of Magn. and Magn. Mater 193, p. 388-394, (1999). [PDF UCSD only]
  164. "Scaling of hysteresis and transition parameter with grain size in longitudinal thin film media", H. Zhou and H. N. Bertram, J. Appl. Phys., 85(8), p. 4982-4984, (1999). [PDF UCSD only]
  165. "Arrhenius-Néel thermal decay in polycrystalline thin film media", H. N. Bertram and H. J. Richter, J. Appl. Phys., 85(8), p. 4991-4993, (1999). [PDF UCSD only]
  166. "Magnetization reversal as a nonlinear multimedia process", V. L. Safonov and H. N. Bertram, J. Appl. Phys., 85(8), p. 5072-5074, (1999). [PDF UCSD only]
  167. "Determination of the magnetic damping constant in NiFe films", G. M. Sandler, H. N. Bertram, T. J. Silva and T. M. Crawford, J. Appl. Phys., 85(8), p. 5080-5082, (1999). [PDF UCSD only]
  168. "Writing on perpendicular patterned media at high density and data rate", E. D. Boerner and H. N. Bertram, J. Appl. Phys., 85(8), p. 5318-5320, (1999). [PDF UCSD only]
  169. "Numerical study of hysteresis and morphology in elongated tape particles", C. Seberino and H. N. Bertram, J. Appl. Phys., 85(8), p. 5543-5545, (1999). [PDF UCSD only]
  170. "Analysis of the effect of write field rise time on signal, noise and nonlinear transition shift", X. Xing and H. N. Bertram, J. Appl. Phys., 85(8), p. 5861-5863, (1999). [PDF UCSD only]
  171. "Error rate analysis of PR channels in the presence of texture noise", X. Xing and H. N. Bertram, IEEE Trans. Magn. 35(3), p. 2070-2079, (1999). [PDF UCSD only]
  172. "Micromagnetic study of longitudinal thin film media: Effect of grain size distribution", H. Zhou, H. N. Bertram, M. Doerner and M. Mirzamaani, Digest, INTERMAG 1999, p. EB-03, (May). IEEE Trans. Magn., 35(5), p. 2712-2714, (1999). [PDF UCSD only]
  173. "Thermal decay of signal and noise in high density thin film media", Y. Zhang and H. N. Bertram, IEEE Trans. Magn., 35(5), p. 4326-4338, (1999). [PDF UCSD only]
  174. "Extending the limits of magnetic recording", H. N. Bertram, H. Zhou, C. Seberino, A. Majumdar, S. Johnson, B. Sinkovits, EnVision, 16(2), p. 14, (2000). [PDF UCSD only]
  175. "Dynamics of magnetization reversal", V. L. Safonov and H. N. Bertram, American Physical Society Bulletin, 45(1), p. 520, March 2000. (Invited). [Abstract]
  176. "Dynamic relaxation in thin films", E. Boerner, H. N. Bertram, and H. Suhl, J. Appl. Phys., 87(9), p. 5389-5391, (2000). [PDF UCSD only]
  177. "Intrinsic mechanisms of nonlinear damping in magnetization reversal", V. L. Safonov and H. N. Bertram, J. Appl. Phys., 87(9), p. 5508-5510, (2000). [PDF UCSD only]
  178. "Effects of head field pulse and rise time on subnanosecond magnetization reversal in longitudinal thin film media", M. E. Schabes, H. Zhou and H. N. Bertram, J. Appl. Phys., 87(9), p. 5666-5668, (2000). [PDF UCSD only]
  179. "Micromagnetic study of dynamic switching constant in longitudinal thin film media", A. F. Torabi, H. Zhou and H. N. Bertram, J. Appl. Phys., 87(9), p. 5669-5671, (2000). [PDF UCSD only]
  180. "Micromagnetic analysis of anisotropy orientation in high density longitudinal magnetic recording", H. Zhou, H. N. Bertram, M. Doerner and M. Mirzamaani, J. Appl. Phys., 87(9), p. 5675-5677, (2000). [PDF UCSD only]
  181. "‘Dynamic-thermal’ reversal in fine micromagnetic grain: time dependence of coercivity", V. L. Safonov and H. N. Bertram, J. Appl. Phys., 87(9), p. 5681-5683, (2000). [PDF UCSD only]
  182. "SNR and density limit estimates: A comparison of longitudinal and perpendicular recording", H. N. Bertram and M. Williams, IEEE Trans. Magn., 36(1), p. 4-9, (2000). [PDF UCSD only]
  183. "Effect of grain size distribution on recording performance in longitudinal thin film media", H. Zhou and H. N. Bertram, IEEE Trans. Magn., 36(1), p. 61-66, (2000). [PDF UCSD only]
  184. "Analysis of tape surface roughness by magnetic recording and mechanical methods", P. Luo, S. Tan, H. N. Bertram, G. F. Hughes, F. E. Talke, IEEE Trans. Magn., 36(1), p. 189-194, (2000). [PDF UCSD only]
  185. "Impurity relaxation mechanism for dynamic magnetization reversal in a single domain grain", V. L. Safonov and H. N. Bertram, Phys. Review B, 61(22), p. 893-896, (2000). [PDF UCSD only]
  186. "Experimental study of the off-track dependence of medium noise using a mode projection method", Z. Jin, K. Zhang, G.-H. Lin, and H. N. Bertram, Digest, INTERMAG 2000, p. 680 (April), IEEE Trans. Magn., 36(5), p. 2145-2156, (2000). (Invited) [PDF UCSD only]
  187. "A growth model for polycrystalline thin film media: Comparison of bicrystal and unicrystal grain structures", Z. Jin, M. Doerner, and H. N. Bertram, Digest, INTERMAG 2000, p. 493, (April), IEEE Trans. Magn., 36(5), p. 2294-2296, (2000). [PDF UCSD only]
  188. "Reversal field versus pulse time: Theoretical and experimental comparison", H. N. Bertram and V. L. Safonov, IEEE Trans. Magn., 36(5), p. 2447-2449, (2000). [PDF UCSD only]
  189. "Micromagnetic recording model of pole-tip saturation effects", J. van Ek, M. Plumer, H. Zhou and H. N. Bertram, IEEE Trans. Magn., 36(6), p. 3975-3983, (2000). [PDF UCSD only]
  190. "Magnetic analysis of contact head/tape spacing", P. Luo, S. Tan, H. N. Bertram, G. Hughes and F. E. Talke, IEEE Trans. Magn., 36(6), p. 3984-3990, (2000). [PDF UCSD only]
  191. "Simulation of the effect of medium noise on servo position error signal detection in longitudinal recording", Z. Jin and H. N. Bertram, IEEE Trans. Magn., 36(6), p. 4011-4018, (2000). [PDF UCSD only]

  192. 2001 - 2004
  193. "Magnetization dynamics and thermal fluctuations in fine grains and films", V. Safonov and H. N. Bertram, in The Physics of Ultra-High Density Magnetic Recording, p. 81-109, eds. M. Plumer, J. van Ek and D. Weller, Springer-Verlag Publishers, (2001). [PDF UCSD only]
  194. "Spin-wave dynamic magnetization reversal in a ‘quasi’ single domain magnetic grain", V. L. Safonov and H. N. Bertram, Phys. Rev. B 63 094419(11), (2001). [PDF UCSD only]
  195. "Modeling the effect of interactions in granular magnetic films", A. D. Liu and H. N. Bertram, J. Appl. Phys., 89(5), p. 2861-2867, (2001). [PDF UCSD only]
  196. "The effect of uniaxial quartic anisotropy on thermal stability of magnetic nanograins", H. N. Bertram and V. L. Safonov, Applied Physics Letters, 79(26), p. 4402-4404, (December 2001). [PDF UCSD only]
  197. "Concise, efficient three-dimensional fast multipole method for micromagnetics", C. Seberino and H. N. Bertram, IEEE Trans. Magn., 37(3), p. 1078-1086, (2001). [PDF UCSD only]
  198. "Three dimensional micromagnetic analysis of write head dynamics and field patterns", K. Gao and H. N. Bertram, IEEE Trans. Magn., 37(4), p. 1373-1375, ( July 2001). [PDF UCSD only]
  199. "A model for bit error rate degradation during thermal decay", Z. Jin. H. Ide, H. Zhou, P. Luo and H. N. Bertram, IEEE Trans. Magn., 37(4), p. 1393-1395, (2001). [PDF UCSD only]
  200. "Micromagnetic study of anisotropy sources in textured longitudinal media", G. Khanna, B. M. Clemens, H. Zhou and H. N. Bertram, IEEE Trans. Magn., 37(4), p. 1468-1470, (July 2001). [PDF UCSD only]
  201. "Analytic solution for magnetic orientation between grains", D. I. Paul, C. M. Robson and H. N. Bertram, IEEE Trans. Magn., 37(4), p. 1478-1480, (July 2001). [PDF UCSD only]
  202. "Dynamic-thermal effects in thin film media", H. N. Bertram, X. Wang, and V. L. Safonov. IEEE Trans. Magn., 37(4), p. 1521-1527, (July 2001). [PDF UCSD only]
  203. "Collective thermal fluctuations in nominally ‘independent’ granular recording media: Application to thermal decay", V. L. Safonov and H. N. Bertram, IEEE Trans. Magn., 37(4), p. 1550-1553, (July 2001). [PDF UCSD only]
  204. "Effect of intergranular exchange on thermal energy barrier distributions in longitudinal magnetic recording", H. Zhou, H. N. Bertram, A. F. Torabi and M. L. Mallary, IEEE Trans. Magn., 37(4), p. 1558-1560, (July 2001). [PDF UCSD only]
  205. "Micromagnetic study of switching speed in perpendicular recording media", M. Benakli, A. F. Torabi. M. L. Mallory, H. Zhou and H. N. Bertram, IEEE Trans. Magn., 37(4), p. 1564-1566, (2001). [PDF UCSD only]
  206. "Tape medium noise measurements and analysis", P. Luo and H. N. Bertram, IEEE Trans. Magn., 37(4), p. 1620-1623, (July 2001). [PDF UCSD only]
  207. "Simulation of servo position error signal in perpendicular recording", Z. Jin. H. N. Bertram and P. Luo, IEEE Trans. Magn., 37(6), p. 3977-3980, (November 2001). [PDF UCSD only]
  208. "Thermally Activated Magnetization Fluctuations in Spin Valve and GMR Sensors: Mode Theory and Experimental Measurements", Z. Jin, H. N. Bertram and V. Safonov, Digest, INTERMAG 2002, p. BP-7, (May2002). [PDF UCSD only]
  209. "Dynamics in Perpendicular Recording Using 3D Micromagnetic Simulation", K. Gao and H. N. Bertram, Digest, INTERMAG 2002, p. CB-9, (May 2002). [PDF UCSD only]
  210. "Thermal Noise, Damping Fundamentals and Mode Analysis: Application to GMR Sensors", H. N. Bertram and V. L. Safonov, Digest, INTERMAG 2002, p. EA-6, (May 2002). [PDF UCSD only]
  211. "Head-Field Rise-Time Effects in Perpendicular Recording", K. Nakamoto and H. N. Bertram, Digest, INTERMAG 2002, p. EQ-2, (May 2002). [PDF UCSD only]
  212. "Playback Signal in Perpendicular Recording for an Off-Centered GMR Element", B. Valcu and H. N. Bertram, Digest, INTERMAG 2002, p. EQ-8, (May 2002). [PDF UCSD only]
  213. "Approaches to Evaluate Thermal Reversal of Interacting Magnetic Grains", X. Wang, H. N. Bertram, R. W. Gustafson, E. Boerner, A. Lyberatos and V. L. Safonov, Digest, INTERMAG 2002, p. EQ-9, (May 2002). [PDF UCSD only]
  214. "Experimental and theoretical studies of thermal magnetization noise in GMR heads", H. N. Bertram, Z. Jin and V. L. Safonov, IEEE Trans. Magn. 38(1), p. 38-44, (January 2002). (Invited) [PDF UCSD only]
  215. "Pulse shape, resolution and signal-to-noise ratio in perpendicular recording", B. Valcu, T. Roscamp and H. N. Bertram, IEEE Trans. Magn., 38(1), p. 288-294, (January 2002). (Invited) [PDF UCSD only]
  216. "Micromagnetic analysis of the effect of intergranular exchange on thermal stability in magnetic recording: (I) 2D isotropic longitudinal media", H. Zhou and H. N. Bertram, IEEE Trans. Magn., 38(2), p. 1405-1416, (March 2002). [PDF UCSD only]
  217. "Micromagnetic analysis of the effect of intergranular exchange on thermal stability in magnetic recording: (II) Slightly oriented longitudinal media", H. Zhou and H. N. Bertram, IEEE Trans. Magn., 38(2), p. 1417-1421, (March 2002). [PDF UCSD only]
  218. "Micromagnetic analysis of the effect of intergranular exchange on thermal stability in magnetic recording: (III) Perpendicular Media", H. Zhou and H. N. Bertram, IEEE Trans. Magn., 38(2), p. 1422-1428, (March 2002). [PDF UCSD only]
  219. "Simulation of the off-track capability of a one Terabit per square inch recording system", Z. Jin, H. N. Bertram, B. Wilson and R. Wood, IEEE Trans. Magn., 38(2), p. 1429-1435, (March 2002). [PDF UCSD only]
  220. "Experimental study of signal-dependent noise in metal particle tape", P. Luo, H. N. Bertram, B. Buchan and Z. Jin, IEEE Trans. Magn., 38(4), p. 1807-1813, (July 2002). [PDF UCSD only]
  221. "Thermal magnetization noise in a thin film", V. L. Safonov and H. N. Bertram, Physical Review B, vol. 65(4), p. 172417-4, (May 2002). [PDF UCSD only]
  222. "Conditions for infinite reversible susceptibility as magnetic systems reach irreversible switching", H. N. Bertram and A. D. Liu, J. of Magn. and Magn. Mater. 247(3), p. 279-296, (June 2002). [PDF UCSD only]
  223. "Effect of Cr concentration gradient on the intergranular exchange in CoCr(Ta,Pt) thin films", B. Valcu and H. N. Bertram, J. Appl. Phys., 91(2), p. 764-771, (January 2002). [PDF UCSD only]
  224. "Thermal induced reversal in coupled grains and elongated particles", X. Wang, H. N. Bertram and V. L. Safonov, J. Appl. Phys., 91(10), p. 6920-6922, (May 2002). [PDF UCSD only]
  225. "Nonuniform thermal magnetization noise in thin films: Application to GMR heads",, V. L. Safonov and H. N. Bertram, J. Appl. Phys., 91(10), p. 7279-7281, (May 2002). [PDF UCSD only]
  226. "Effect of intergranular interactions on thermal energy barrier distribution on perpendicular media", H. Zhou, H. N. Bertram, and M. E. Schabes, J. Appl. Phys., 91(10), p. 8378-8380, (May 2002). [PDF UCSD only]
  227. "Determination of transition shape by transition mode noise analysis", Z. Jin, P. Luo, H. N. Bertram, K. Zhang and G. H. Lin, J. Appl. Phys., 91(10), p. 8706-8708, (May 2002). [PDF UCSD only]
  228. "Effect of temperature and cubic anisotropy on the switching field of cylindrical Ni particles", M. Hwang, M. Shima, C. A. Ross, C. Seberino and H. N. Bertram, J. Appl. Phys., 92(2), p. 1018-1023, (July 2002). [PDF UCSD only]
  229. "Thermal-dynamic reversal of fine magnetic grains with arbitrary anisotropy axes orientation", X. Wang, H. N. Bertram and V. L. Safonov, J. Appl. Phys., 92(4), p. 2064-2072, (August 2002). [PDF UCSD only]
  230. "Field and temperature dependent attempt frequency for dynamic-thermal reversal of magnetic grains", X. Wang and H. N. Bertram, J. Appl. Phys., 92(8), p. 4560-4570, (October 2002). [PDF UCSD only]
  231. "Effect of crystallographic orientation on grain size distribution", B. Valcu, Y. Takahashi, H. N. Bertram, J. Appl. Phys., 92(10), p. 6094-6098. (November 2002). [PDF UCSD only]
  232. "Write field analysis in perpendicular recording using three-dimensional micromagnetic simulation", K. Gao and H. N. Bertram, J. Appl. Phys., 92(10), p. 8369-8371, (May 2002). [PDF UCSD only]
  233. "Fast switching in single domain particle under sub Stoner-Wohlfarth switching fields", K. Gao, E. Boerner and H. N. Bertram, Applied Physics Letters, 81(21), p. 4008-4010, (November 2002). [PDF UCSD only]
  234. "Analytic perpendicular-recording model for transition parameter and NLTS", K. Nakamoto and H. N. Bertram, The Magnetic Society of Japan, vol. 27, no. 2, p. 79-85, (2002).
  235. "3D micromagnetic simulation of write field rise time in perpendicular recording", K. Gao and H. N. Bertram, IEEE Trans. Magn., 38(5), p. 2063-2065, (September 2002). [PDF UCSD only]
  236. "Effect of head-field rise-time in perpendicular recording", K. Nakamoto and H. N. Bertram, IEEE Trans. Magn., 38(5), p. 2069-2071, (September 2002). [PDF UCSD only]
  237. "3D analysis of the playback signal in perpendicular recording for an off-centered GMR element", B. Valcu and H. N. Bertram, IEEE Trans. Magn., 38(5), p. 2081-2083, (September 2002). [PDF UCSD only]
  238. "Thermal decay of interacting grains in perpendicular thin film media", X. Wang, H. N. Bertram, E. Boerner, A. Lyberatos and V. L. Safonov, IEEE Trans. Magn., 38(5), p. 2084-2086, (September 2002). [PDF UCSD only]
  239. "Experimental measurements and analysis of thermal magnetization noise in GMR sensors", Z. Jin, H. N. Bertram and V. L. Safonov, IEEE Trans. Magn., 38(5), p. 2265-2267, (September 2002). [PDF UCSD only]
  240. "Thermal magnetization noise, damping fundamentals and mode analysis: Application to a thin film GMR sensor", H. N. Bertram, V. L. Safonov and Z. Jin, IEEE Trans. Magn., 38(5), p. 2514-2519, (September 2002). (Invited) [PDF UCSD only]
  241. "Write field analysis and write pole design in perpendicular recording", K. Gao and H. N. Bertram, IEEE Trans. Magn., 38(5), p. 3521-3527, (September 2002). [PDF UCSD only]
  242. "Magnetic recording configuration for densities beyond 1 Tb/in2 and data rates beyond 1 Gb/s", K. Gao and H. N. Bertram, IEEE Trans. Magn. 38(6), p. 3675-3683, (November 2002). [PDF UCSD only]
  243. "Physical interpretation of hysteresis loops: Micromagnetic modeling of fine particle magnetite", L. Tauxe, H. N. Bertram and C. Seberino, Geochem. Geophys. Geosyst., 3(10), p. 1055-1076, (October 2002). [PDF UCSD only]
  244. "Magnetic properties of arrays of electro deposited nanowires", C.A. Ross, M. Nwang, M. Shima, H. I. Smith, M. Farhoud, T. A. Savas, W. Schwarzacher, J. Parrochon, W. Escoffier, H. N. Bertram, F. B. Humphrey and R. Redjdal, J. of Magn. and Magn. Mater., 249, p. 200-207, (August 2002). [PDF UCSD only]
  245. "Effects of Distributions in Tilted and Conventional Perpendicular Recording", K-Z. Gao and H. N. Bertram, Digest, NAPMRC 2003, p. 39, (January2003). [PDF UCSD only]
  246. "Transition jitter estimates in tilted and conventional perpendicular recording media at 1 Tbit/in2", K. Gao and H. N. Bertram, IEEE Trans. Magn., 39(2), p. 704-709, (March 2003). [PDF UCSD only]
  247. "PRML channel performance under the influence of medium noise in tape recording system", P. Luo, Z. Jin and H. N. Bertram, IEEE Trans. Magn., 39(2), p. 1072-1080, (March 2003). [PDF UCSD only]
  248. "Analyses of the effect of head imaging on medium demagnetization field in perpendicular recording", H. Zhou, K. Gao and H. N. Bertram, J. Appl. Phys., 93(10), p. 6537-6539, (May 2003). [PDF UCSD only]
  249. "Energy surface model of single particle reversal in sub-Stoner-Wohlfarth switching fields", K. Gao, E. Boerner, and H. Neal Bertram, J. Appl. Phys., 93(10), p. 6549-6551, (May 2003). [PDF UCSD only]
  250. "Nonlinear microscopic relaxation of uniform magnetization precession", V. L. Safonov and H. N. Bertram, J. Appl. Phys., 93(10), p. 6912-6914, (May 2003). [PDF UCSD only]
  251. "Simple transition parameter expression including grain size and intergranular exchange", X. Wang and H. N. Bertram, J. Appl. Phys., 93(10), p. 7005-7007, (May 2003). [PDF UCSD only]
  252. "Anomalously large damping in magnetization reversal", X. Wang and H. N. Bertram, J. Appl. Phys., 93(10), p. 7396-7398, (May 2003). [PDF UCSD only]
  253. "Track edge effect in tilted and conventional perpendicular recording", K. Gao, X. Wang and H. N. Bertram, J. Appl. Phys., 93(10), p. 7840-7842, (May 2003). [PDF UCSD only]
  254. "Thermal stability of coupled ferromagnetic and superparamagnetic particles", V. L. Safonov and H. N. Bertram, J. Appl. Phys., 93(10), p. 8474-8476, (May 2003). [PDF UCSD only]
  255. "Linear stochastic magnetization dynamics and microscopic relaxation mechanisms", V. L. Safonov and H. N. Bertram, J. Appl. Phys., 94(1), p.529-538, (July 2003). [PDF UCSD only]
  256. "Micromagnetic study of the transition parameter and position jitter in perpendicular recording", Y. Shimizu and H. N. Bertram, IEEE Trans. Magn., 39(3), p. 1846-1850, (May 2003). [PDF UCSD only]
  257. "An analytical model for the cross-track correlation length including inter-granular interactions", Z. Jin, X. Wang and H. N. Bertram, IEEE Trans. Magn. 39(5), p. 2603-2605, (September 2003). [PDF UCSD only]
  258. "Measurements and analysis of transition noise in perpendicular media", C. Fu, Z. Jin, H. N. Bertram, Y. Wu and D. Guarisco, IEEE Trans. Magn. 39(5), p. 2606-2608, (September 2003). (See #266 for Errata) [PDF UCSD only]
  259. "Energy barrier and effective thermal reversal volume in columnar grains", H. Forster, N. Bertram, X. Wang, R. Dittrich and T. Schrefl, J. of Magn. and Magn. Mater, 267(1), p. 69-79, (November 2003). [PDF UCSD only]
  260. "Local relaxation mechanisms and collective stochastic dynamics", H. N. Bertram and X. Wang, J. of Magn. and Magn. Mater, 271, p. 254-269, (May 2004) [PDF UCSD only]
  261. "Quasi-analytical calculation of thermal magnetization fluctuation noise in GMR sensors", Z. Jin, H. N. Bertram and V. Safonov, IEEE Trans. Magn., 40(3), p. 1712-1722, (May 2004). [PDF UCSD only]
  262. "Analysis of DC noise in thin film media", H. N. Bertram, M. Marrow, J. Ohno, C. Fu, J. K. Wolf, IEEE Trans. Magn., 40(4), p. 2311-2313, (July 2004). [PDF UCSD only]
  263. "Soft underlayer magnetization dynamics", B. Valcu and H. N. Bertram, IEEE Trans. Magn., 40(4), p. 2377-2379, (July 2004). [PDF UCSD only]
  264. "Thermal reversal of elongated ferromagnetic particles misoriented to the applied field", D. Goll and H. N. Bertram, IEEE Trans. Magn., 40(4), p. 2416-2418, (July 2004). [PDF UCSD only]
  265. "Thermal decay and erasure process for perpendicular recording at 1Tb/in2", K. Z. Gao, M. Williams, H. Zhou, J. Fernandez-de-Castro and H. N. Bertram, IEEE Trans. Magn., 40(4), p. 2449-2451, (July 2004). [PDF UCSD only]

  266. 2005 -
  267. "Technique to obtain head-medium magnetic spacing in a disk drive", C. Fu, A. Takeo and H. N. Bertram, J. Appl. Phys., 97(10), p. 10P107(1-3), (May 2005). [PDF UCSD only]
  268. "DC noise enhancement due to correlations between grain size and switching field", M. Marrow and H. N. Bertram, J. Appl. Phys., 97(10), p. 10N101(1-3), (May 2005). [PDF UCSD only]
  269. "Pulses shape, resolution and signal-to-noise ratio in patterned media recording", A. Takeo and H. N. Bertram, J. Appl. Phys., 97(10), p. 10N104(1-3), (May 2005). [PDF UCSD only]
  270. "Micromagnetic study of the switching fields in polycrystalline magnetic thin-film media", K-Z. Gao, J.Fernandez-de-Castro, and H. N. Bertram, IEEE Trans. Magn., 41(11), p.4236-4241, (November 2005). [PDF UCSD only]
  271. "Correction to: "Measurements and analysis of transition noise in perpendicular media", C. Fu, Z. Jin, H. N. Bertram, IEEE Trans. Magn. 41(11) p. 4371 (November 2005). [PDF UCSD only]
  272. "Minimum particle volume of tilted and composite media considering magneto-static interactions", A. Takeo & H. N. Bertram, Digest IEEE International Magnetics Conference, 2005. INTERMAG, p.1363-1364 (April 2005). [PDF UCSD only]
  273. "A technique to obtain head-medium magnetic spacing in a disk drive", C. Fu, A. Takeo and H. N. Bertram, J. Appl. Phys. 97(10), p. 10P107 (May 2005). [PDF UCSD only]
  274. "Fluctuation-dissipation considerations and damping models for ferromagnetic materials", H. N. Bertram and V. L. Safonov, Physical Review B-Condensed Matter, 71(22), p. 224402-1-5, (June 2005). [PDF UCSD only]
  275. "Magnetic ground states and the role of vortices in ferromagnetic hollow nanosphers", D. Goll, S. Macke, A. E. Berkowitz, and H. N. Bertram, Physica B, 372 (1-2), p. 282-285, (February 2006). [PDF UCSD only]
  276. "Transition shape analysis from medium noise measurements", H. N. Bertram, A. Takeo, Z. Jin and C. Fu, IEEE Trans. Magn., 42(5), p.1620-1625, (May 2006). [PDF UCSD only]
  277. "Design parameter optimization for perpendicular magnetic recording systems", P. Chaichanavong, H. N. Bertram, P. H. Siegel, IEEE Trans. Magn., 42(10), p. 2549-2554, (October 2006). [PDF UCSD only]
  278. "Design curves and information-theoretic limits for perpendicular recording systems", Z. Wu, P. H. Siegel, H. N. Bertram, and J. K. Wolf, IEEE Trans. Magn., 43(2), p. 721-726, (February 2007). [PDF UCSD only]
  279. "Thermal reversal of exchange spring composite media in magnetic fields", D. Goll, S. Macke, H. N. Bertram. Applied Physics Letters, 90, 172506-1-3 (April 2007). [PDF UCSD only]
  280. "Energy barriers in composite media grains", H. N. Bertram and B. Lengsfield. IEEE Trans. Magn., 43(6), p. 2145-2147, (June 2007). [PDF UCSD only]
  281. "Magnetization reversal in patterned media", V. Lomakin, B. Livshitz and H. N. Bertram. IEEE Trans. Magn., 43(6), p. 2154-2156, (June 2007). [PDF UCSD only]
  282. "Precessional reversal in exchange-coupled composite magnetic elements", B. Livshitz, A. Inomata, H.N. Bertram, and V. Lomakin, Applied Physics Letters, 91(18), p. 182502, (October 2007). [PDF UCSD only]
  283. "Dual-layer patterned media "ledge" design for ultrahigh density magnetic recording", V. Lomakin, R. Choi, B. Livshitz, S. Li, A. Inomata, and H.N. Bertram, Applied Physics Letters, 92( 2), p. 022502, (January 2008). [PDF UCSD only]
  284. "A new read channel model for patterned media storage", S. Karakulak, P. H. Siegel, J. K. Wolf, and H. N. Bertram, IEEE Trans. Magn., 44(1), pp. 193-197, (January 2008). [PDF UCSD only]
  285. "Nucleation fields in composite medium grains", H. N. Bertram, M. E. Schabes, V. Lomakin, and B. Livshitz, Journal of Applied Physics, 103(7), p. 07F508, (April 2008). [PDF UCSD only]
  286. "Fast precessional reversal in perpendicular composite patterned media", B. Livshitz, R. Choi, V. Lomakin, A. Inomata, H.N. Bertram, Journal of Applied Physics, 103(7), p. 07C516, (April 2008). [PDF UCSD only]
  287. "Nonlinear transition shift and write precompensation in perpendicular magnetic recording", Z. Wu, H. N. Bertram, P. H. Siegel, and J. K. Wolf, IEEE International Conference on Communications, Beijing, China, p. 1972-1976, (May 19-23, 2008). [PDF UCSD only]
  288. "Error rate expression for perpendicular magnetic recording", H. N. Bertram, B. Wilson, and R. Wood, IEEE Trans. Magn., 44(10), pp. 2414-2422, (October 2008). [PDF UCSD only]
  289. "Mean-adjusted pattern-dependent noise prediction for perpendicular recording channels with nonlinear transition shift", Z. Wu, P. H. Siegel, J. K. Wolf, and H. N. Bertram, IEEE Trans. Magn., 44(11), pp. 3761-3764, (November 2008). [PDF UCSD only]
  290. "Precessional magnetization reversal in composite patterned media: Dependence on applied field parameters", B. Livshitz, H.N. Bertram, and V. Lomakin, IEEE Trans. Magn., 44(11), pp. 3075-3078, (November 2008). [PDF UCSD only]
  291. "Patterned media for 10 Tb/in2 utilizing dual-section "Ledge" elements", V. Lomakin, S. Li, B. Livshitz, A. Inomata, and H.N. Bertram, IEEE Trans. Magn.,44(11), pp. 3454-3459, (November 2008). [PDF UCSD only]
  292. "Capped bit patterned media for high density magnetic recording", S. Li, B. Livshitz, H.N. Bertram, A. Inomata, E.E. Fullerton, and V. Lomakin, Journal of Applied Physics, 105(7), pp. 07C122-1-3, (April 2009)  [PDF  UCSD only]
  293. "Analysis of recording in bit patterned media with parameter distributions", B. Livshitz, A. Inomata, H.N. Bertram, and V. Lomakin, Journal of Applied Physics, 105(7), pp. 07C111-1-3, (April 2009).  [PDF  UCSD only]
  294. "Microwave-assisted magnetization reversal and multilevel recording in composite media", S. Li, B. Livshitz, H.N. Bertram, E.E. Fullerton, and V. Lomakin, Journal of Applied Physics, 105(7), pp. 07B909-1-3, (April 2009). [PDF UCSD only]
  295. "Nonuniform grid algorithm for fast calculation of magnetostatic interactions in micromagnetics", B. Livshitz, A. Boag, H.N. Bertram, and V. Lomakin, Journal of Applied Physics, 105(7), pp. 07D541-1-3, (April 2009). [PDF UCSD only]
  296. "Microwave assisted magnetization reversal in composite media", S. Li, B. Livshitz, H.N. Bertram, M. Schabes, T. Schrefl, E.E. Fullerton, and V. Lomakin, Applied Physics Letters, 94(20), pp. 202509-1-3, (May 2009).  [PDF  UCSD only]
  297. "A model for noise power nonlinearities in perpendicular magnetic recording", H.N. Bertram and M.E. Schabes, IEEE Trans. Magn.,45(8), pp. 3100-3106, (August 2009). [PDF UCSD only][ Correction]
  298. "Measurements and analysis of noise power versus density in perpendicular recording", H.N. Bertram, M.E. Schabes, and M. Alex, IEEE Trans. Magn., 45(10), pp. 3562-3564, (October 2009). [PDF UCSD only]
  299. "Semi-analytical approach for analysis of ber in conventional and staggered bit patterned media", B. Livshitz, A. Inomata, H.N. Bertram, and V. Lomakin, IEEE Trans. Magn., 45(10), pp. 3519-3522, (October 2009). [PDF UCSD only]
  300. "Analysis of nonlinear transition shift and write precompensation in perpendicular recording systems", Z. Wu, P.H. Siegel, J.K. Wolf, and H.N. Bertram, IEEE Journal on Selected Areas in Communications, 28( 2), pp. 158-166, (February 2010).  [PDF  UCSD only]

Pending
  1. "Joint-track equalization and detection for bit patterned media recording", S. Karakulak, P.H. Siegel, J.K. Wolf, H.N. Bertram, IEEE Trans. Magn. [PDF pending]

Patents
  1. Permanent magnet biased narrow track magnetoresistive transducer, United States Patent No. 4,623,867, J.R. Lundquist and H. Neal Bertram, (November 1986)

Research Group

 

Alumni:
Student Name: Alexander Barany
Dissertation: Noise and Non-Linear Recording Phenomena in Thin Metallic Films  [Abstract]
Degree: Ph.D.
Year: 1988

Student Name: Eric Boerner
Dissertation: Simulation of Thermal Decay and Dynamic Relaxation in Ferromagnetic   [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 2000

Student Name: Eric Champion
Dissertation: Digital Magnetic Recording Systems Utilizing Magnetoresistive (Mr) Playback Technology: Theoretical Studies  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 1997

Student Name: Kaizhong Gao
Dissertation: Optimization of Write Heads and Media for Ultra High Density and Data Rate Magnetic Recording  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 2002

Student Name: Zhen Jin
Dissertation: Experimental and Theoretical Studies of Noise and Off-Track Issues in Magnetic Recording Systems  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 2002

Student Name: Gang Lin
Dissertation: Experimental Studies of Nonlinearities, Erasure and Noise in Magnetic Recording Channel  [Abstract]
Degree: Ph.D.
Year: 1994

Student Name: Alfred Liu
Dissertation: Numerical Modeling of Granular Magnetic Materials  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 2000

Student Name: Peng Luo
Dissertation: Experimental and Theoretical Studies of Particulate Tape Medium Noise in High-Density Magnetic Recording Systems  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 2001

Student Name: Qingzhi Peng
Dissertation: Microstructural Dependence of Magnetization Process in Thin Film Recording Media  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 1997

Student Name: Gene Sandler
Dissertation: Computational Analyses of Magnetization Dynamics in Thin Film Write   [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 1998

Student Name: Manfred Schabes
Dissertation: Micromagnetics of Small Ferromagnetics Particles  [Abstract only]
Degree: Ph.D.
Year: 1989

Student Name: Christian Seberino
Dissertation: Computational Micromagnetic Study of Particulate Media Hysteresis and Recording  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 2000

Student Name: Thomas Silva *
Dissertation: A Scanning Near-Field Optical Microscope With Magneto - Optic Kerr Effect Contrast for the Imaging Of Magnetic Domains With 200 A Resolution  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 1994

Student Name: Bogdan Valcu
Dissertation: Studies in Perpendicular Magnetic Recording  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 2004

Student Name: David Wachenschwanz
Dissertation: A Study of High Frequency and Saturation Effects in Magnetic Recording Heads
Degree: M.S.
Year: 1990

Student Name: Xiaobin Wang
Dissertation: Studies on Dynamic Thermal Reversal and Transition Jitter in Magnetic Materials  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 2003

Student Name: Xinzhi Xing
Dissertation: Noise and Nonlinearities in Digital Magnetic Recording Systems   [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 1998

Student Name: Samuel Yuan
Dissertation: Micromagnetics of Domains and Walls in Soft Ferromagnetic Materials  [Abstract only]
Degree: Ph.D.
Year: 1992

Student Name: Yun Zhang
Dissertation: MR Playback Characteristics and Thermal Stability of Thin Film Media in High-Density Magnetic Recording Systems  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 1999

Student Name: Hong Zhou
Dissertation: Micromagnetic Analyses of Effects of Intergranular Magnetostatic and Exchange Interactions on Signal-to-Noise Ratio and Thermal Stability in Hard Disk Drive Recording Media  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 2001

Student Name: Jian-Gang Zhu
Dissertation: Interface Phenomena in Magnetic Thin Films  [Abstract]  [PDF UCSD only]
Degree: Ph.D.
Year: 1988

*Co-Chair Advisor

 

Past Visiting Scholars:

 

Jacques Miltat

Hiroshi Ide

Jon Ohno

 

Past Visiting Students:

 

Kazuhiro Nakamoto

Herman Forster

David Paul

Yukiya Shimizu

 

H. Neal Bertram

Bertram
Research Professor (CMRR), Professor Emeritus (ECE)
Phone: 858-534-6588
Fax: 858-534-2720
nbertram@ucsd.edu
Office: CMRR Room 307

UC, San Diego
CMRR
MS: 0401
9500 Gilman Drive, 0401
La Jolla, CA, 92093-0401