Former CMRR Research Member
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.
Introduction to Magnetic Materials and Magnetic Recording - Short Course 2009
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
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