Title :
Effect of orientation ratio on the recording characteristics of longitudinal thin film media
Author :
Takano, Hisashi ; Lam, Terence T. ; Zhu, Jim-Gang ; Judy, Jack H.
Author_Institution :
Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA
fDate :
11/1/1993 12:00:00 AM
Abstract :
The effect of orientation ratio on recording characteristics has been experimentally investigated. Thin film longitudinal media with orientation ratios (ORs) of 2.34 and 0.86, having almost the same coercivity, were used in this study. High OR film medium makes the transition sharp, and high signal output and low medium noise are obtained in low densities. However, at high densities, noise power becomes significantly higher than low OR film medium, and strong demagnetization field from previously recorded transition induces nonlinear bit shift of newly recorded transition which results in poor overwrite performance
Keywords :
magnetic hysteresis; magnetic recording; magnetic thin films; magnetic transitions; magnetisation; noise; effect of orientation ratio; high densities; hysteresis curves; longitudinal thin film media; low densities; magnetic recording characteristics; noise power; nonlinear amplitude reduction; nonlinear bit shift; overwrite performance; strong demagnetization field; Coercive force; Demagnetization; Hysteresis; Laboratories; Lifting equipment; Magnetic field measurement; Micromagnetics; Noise level; Signal to noise ratio; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
