Experimental measurements and analysis of thermal magnetization noise in GMR sensors

被引：12
作者：
Jin, Z [1 ]
Bertram, HN
Dakroub, H
机构：
[1] Univ Calif San Diego, Ctr Magnet Recording Res, La Jolla, CA 92093 USA
[2] Seagate Technol, Oklahoma City, OK 73127 USA
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2002年 / 38卷 / 05期
基金：
美国国家科学基金会; 美国安德鲁·梅隆基金会;
关键词：
dynamic damping parameter; giant magnetoresistance heads; magnetization noise spectra; thermal fluctuations;
D O I：
10.1109/TMAG.2002.802685
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：
High-frequency measurements and theoretical analysis of data on giant magnetoresistance thermal magnetization fluctuation noise are presented. An experimental setup for the measurement of this noise at high frequencies is proposed. The measured noise increases with bias current and demonstrates two distinct resonance peaks within 6 GHz. Damping parameters are extracted from resonance linewidth data. Small variations are seen within a given manufacturing batch of eight heads. Data fitting to the measured-noise power spectrum and comparison between eigenmode and Landau-Lifshitz-Gilbert theories.
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页码：2265 / 2267
页数：3
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