Thermal decay of signal and noise in high-density thin-film media

被引：13
|
作者：
Zhang, Y
Bertram, HN
机构：
[1] Univ Calif San Diego, Ctr Magnet Recording Res, La Jolla, CA 92093 USA
[2] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
来源：
IEEE TRANSACTIONS ON MAGNETICS | 1999年 / 35卷 / 05期
基金：
美国国家科学基金会;
关键词：
magnetic disk recording; signal-to-noise ratio; stability;
D O I：
10.1109/20.799083
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A combined experimental and theoretical study of signal and noise decay in a thin-film longitudinal medium is described, The experimental results show that medium noise power increases with time while signal power decreases, resulting in a degradation of signal-to-noise ratio (SNR). A medium noise model is developed. By utilizing this model in combination with a previous model of magnetization decay, noise power and SNR decays are calculated. Good agreement between calculations and experimental results is obtained. Theoretical estimates of the dependence of the thermal decay of SNR with temperature and average grain size are given for a high-density system.
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页码：4326 / 4338
页数：13
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