Thermal and spin-torque noise in CPP (TMR and/or GMR) read sensors

被引：46

作者：

Smith, N ^{[1
]}

Katine, JA ^{[1
]}

Childress, JR ^{[1
]}

Carey, MJ ^{[1
]}

机构：

[1] Hitachi Global Storage Technol, San Jose, CA 95120 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2006年 / 42卷 / 02期

关键词：

current-perpendicular-to-plane; giant magnetoresistance; read head; spin-torque;

D O I：

10.1109/TMAG.2005.861783

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：

This paper considers magnetization fluctuations (mag-noise) in current-perpendicular-to-plane (CPP) read sensors, due to either thermal fluctuations or spin-torque induced instability. The former are relevant to both tunneling (TMR) and giant-magnetoresistance (GMR) devices, the latter a potentially more serious limitation most relevant to all-metal GMR sensors. Discussion of thermal mag-noise is here treated by micromagnetic simulation. Discussion of spin-torque instability includes analytical modeling combined with experimental measurements.

引用

收藏

页码：114 / 119

页数：6

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