Pseudo spin valves based on L10 (111)-oriented FePt fixed layers with tilted anisotropy

被引：49

作者：

Zha, C. L. ^{[1
]}

Persson, J. ^{[1
]}

Bonetti, S. ^{[1
]}

Fang, Y. Y. ^{[1
]}

Akerman, Johan ^{[1
,2
]}

机构：

[1] Royal Inst Technol, Dept Microelect & Appl Phys, S-16440 Kista, Sweden

[2] Gothenburg Univ, Dept Phys, S-41296 Gothenburg, Sweden

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 16期

基金：

瑞典研究理事会;

关键词：

cobalt alloys; copper; exchange interactions (electron); giant magnetoresistance; iron alloys; magnetic anisotropy; magnetic multilayers; magnetic switching; magnetisation; nickel alloys; platinum alloys; spin polarised transport; spin valves; HIGH AREAL DENSITY; FILMS;

D O I：

10.1063/1.3123003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate magnetoresistance (MR) in excess of 4% in FePt/CoFe/Cu/CoFe/NiFe pseudo spin valves based on L1(0) (111)-oriented FePt fixed layers with a 36 degrees out-of-plane tilted magnetization. The high MR is achieved by increasing the spin polarization at the Cu interfaces, using thin CoFe, and optimizing the FePt growth and Cu interface quality using Ta and Ta/Pt underlayers. We observe well-separated switching of the FePt/CoFe fixed layer and the CoFe/NiFe free layer, suggesting that CoFe is rigidly exchange coupled to FePt and NiFe in the respective layers.

引用

页数：3

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