A study of voltage fluctuation, noise and magnetic instability in spin valve GMR recording heads

被引：16
|
作者：
Wallash, A [1 ]
机构：
[1] Quantum Corp, Milpitas, CA 95035 USA
来源：
IEEE TRANSACTIONS ON MAGNETICS | 1998年 / 34卷 / 04期
关键词：
GMR; magnetic instability; noise; spin valve;
D O I：
10.1109/20.706579
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：
An abnormal voltage fluctuation in spin valve GMR recording heads is reported. Methodologies for detecting the fluctuation using a spin stand or an MR transfer curve tester are presented and used to study the phenomenon as a function of bias current and magnetic field, It is shown that the fluctuation only occurs within narrow ranges of sensor bias current, is suppressed by an external magnetic field and can result in a 7 dB increase in the noise floor at 10 MHz, Low field transfer curves show that the voltage fluctuation is the result of magnetic instability.
引用
收藏
页码：1450 / 1452
页数：3
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