Learn More
2000 Permission is hereby granted that this dissertation or any parts of it may be copied without fee, as long as reference of authorship is given. iii devoted to my fiancee Claudia Hering and to my parents Beate and Horst-Günther Bertram iv Acknowledgements First, I want to thank my committee members, Bernd Hamann, Mark Duchaineau, and Ken Joy for their(More)
In a perpendicular magnetic recording system, advanced read/write transducers, magnetic media, and signal processing techniques are combined to achieve the highest possible storage density, subject to severe constraints on reliability. This paper proposes a quasi-analytic methodology for exploring the complex design tradeoffs among these system components.(More)
We present a semi-analytical approach for the analysis of synchronization in bit patterned media (BPM) recording. The analysis is based on full numerical micromagnetic calculations of the reversal surfaces of separate BPM element. These reversal surfaces are used to define writing window zones for correct recording in BPM element arrays. The simulations(More)
—The read-write process in perpendicular magnetic recording channels includes a number of nonlinear effects. Nonlinear transition shift (NLTS) arising from previously written transitions is one of these. The signal distortion induced by NLTS is reduced by use of write precompensation during data recording. In this paper, we numerically evaluate the effect(More)
—In high density perpendicular magnetic recording channels, nonlinear transition shift (NLTS) is one of the distortions that can degrade the system performance. Write precompensation is a standard method used to combat the negative effect of NLTS. In this paper, we present an analysis of the bit-error-rate (BER) for perpendicular recording systems with NLTS(More)
  • 1