Theory of Magnetic Recording

Abstract

This book is a comprehensive text on the theory of the magnetic recording process. It gives the reader a fundamental, in-depth understanding of all the essential features of the writing and retrieval of information for both high density disk recording and tape recording. The material is timely because magnetic recording technology is currently undergoing rapid advancement in systems capacity and data rate. The competing technologies of longitudinal and perpendicular recording are given parallel treatments throughout this book. A simultaneous treatment of time and frequency response is given to facilitate assessment of signal processing schemes. In addition to covering basic issues, the author discusses key systems questions of non-linearities and overwrite. The emerging technology of magnetoresisitive heads is analysed separately and three chapters are devoted to various aspects of medium noise. This unique book will be valuable as a course text for both senior undergraduates and graduate students. It will also be of value to research and development scientists in the magnetic recording industry. The book includes a large number of homework problems.

Characterization of magnetostatic surface spin waves in magnetic thin films: evaluation for microelectronic applications

“…1(a) shows the z-component of the magnetization within the sample. In the simulations the Oersted field resulting from an antenna has been replicated using the Karlqvist equations [26] given by…”

In-Plane Transport of Doped Manganite Trilayers

“…The field at which the crossover occurs does not correspond to the shape effect of the transport bar [8,9]. In fact, the field corresponds to the magnetic anisotropy field of the film.…”

Servo signal processing for flying height control in hard disk drives

“…The writing process is less sensitive to flying height variations than the reading process (Yuan et al 2002) Based on those assumptions the change in flying height can be computed from the Wallace equation. The Fourier transform of the read back signal decays exponentially with increasing distance from the magnetic medium (Bertram 1994). For simplicity, only A and B bursts are considered here.…”