Very high sensitivity GMR spin-valve magnetometer

被引：30

作者：

Smith, N

Zeltser, AM

Yang, DL

Koeppe, PV

机构：

[1] San Diego Laboratories, Eastman Kodak Company, San Diego

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1997年 / 33卷 / 05期

关键词：

D O I：

10.1109/20.617952

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 NiFe/Co/Cu GMR spin-valve magnetometer is designed, built, and tested. Thin-film flux-concentrators provide 50 x gain, yielding hysteresis-free sensitivity 1/R dR/dH = 11%/Oe in a 1 mm(2), internally temperature compensated device. Detection levels of 2 mu Oe/(Hz)(1/2) (at 1 Hz) are limited by 1/f resistance noise in the GMR films, which is examined in detail. Improvement by 10x is possible via increased device size, as well as lower noise MR films.

引用

页码：3385 / 3387

页数：3

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