Anomalous magnetoresistance behavior of CoFe nano-oxide spin valves at low temperatures

被引：17

作者：

Ventura, JO

Sousa, JB

da Silva, MAS

Freitas, PP

Veloso, A

机构：

[1] FCUP, IFIMUP, P-4169 Oporto, Portugal

[2] FCUP, Dept Phys, P-4169 Oporto, Portugal

[3] INESC, Solid State Tech Grp, P-1000 Lisbon, Portugal

来源：

JOURNAL OF APPLIED PHYSICS | 2003年 / 93卷 / 10期

关键词：

D O I：

10.1063/1.1540149

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report magnetoresistance curves of CoFe nano-oxide specular spin valves of MnIr/CoFe/nano-oxidized CoFe/CoFe/Cu/CoFe/nano-oxidized CoFe/Ta at different temperatures from 300 to 20 K. We extend the Stoner-Wolfarth model of a common spin valve to a specular spin valve, introducing the separation of the pinned layer into two sublayers and their magnetic coupling across the nano-oxide. We study the effect of different coupling/exchange (between the antiferromagnetic layer and the bottom sublayer) field ratios on the magnetization and magnetoresistance, corresponding with the experimentally observed anomalous bumps in low temperature magnetoresistance curves. (C) 2003 American Institute of Physics.

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页码：7690 / 7692

页数：3

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