Thermal magnetization noise in spin valves

被引：18

作者：

Smith, N ^{[1
]}

Arnett, P ^{[1
]}

机构：

[1] IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2002年 / 38卷 / 01期

关键词：

magnetic heads; magnetic noise; magnetic recording; magnetoresistive devices;

D O I：

10.1109/TMAG.2002.988907

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：

Thermal magnetization fluctuations (mag-noise) in giant magnetoresistive (GMR) spin valve (or any MR) heads will serve as a fundamental limit on their signal-to-noise-ratio (SNR). Measured mag-noise in several varied spin-valve read sensors is shown to be in good quantitative agreement with predictions based on the fluctuation-dissipation theorem. The dependence of magnoise and head-SNR on sensor geometry and other device parametrics is discussed.

引用

页码：32 / 37

页数：6

共 16 条

[11] Inductive measurement of ultrafast magnetization dynamics in thin-film Permalloy [J].