Thermal stability of spin valve with NiO/α-Fe2O3 bilayer antiferromagnets

被引：6

作者：

Fujikata, J ^{[1
]}

Hayashi, K ^{[1
]}

Saito, M ^{[1
]}

Nakada, M ^{[1
]}

机构：

[1] NEC Corp Ltd, Funct Devices Res Labs, Fuchu, Tokyo 183, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1998年 / 34卷 / 04期

关键词：

alpha-Fe2O3; NiO; spin valve; thermal stability;

D O I：

10.1109/20.706324

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：

To enhance the thermal stability of the NiO pinning layers for spin valves, alpha-Fe2O3 layers, of which the Neel temperature is 680 degrees C for bulk, are deposited on NiO layers. With 15-80 Angstrom thick alpha-Fe2O3 layers on NiO layers, an exchange anisotropy field about five times larger than that of NiO/NiFe is obtained after 250 degrees C thermal annealing, Spin valve multilayers with NiO/alpha-Fe2O3 antiferromagnets show about 12% MR ratio. After 150 degrees C annealing, MR ratio changes less than 20% for patterned spin valve multilayers with abutted junctioned hard magnets.

引用

页码：954 / 956

页数：3

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