Magnetotransport properties and spin-torque effects in current perpendicular to the plane spin valves with Co-Fe-Al magnetic layers

被引：25

作者：

Maat, S. ^{[1
]}

Carey, M. J. ^{[1
]}

Childress, J. R. ^{[1
]}

机构：

[1] Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95135 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2007年 / 101卷 / 09期

关键词：

D O I：

10.1063/1.2717012

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetotransport properties of current perpendicular to the plane giant magnetoresistive spin valves utilizing (CoxFe100-x)(100-y)Al-y alloys are investigated over a wide alloy composition range. (Co50Fe50)(75)Al-25 is determined to be the approximate alloy composition that maximizes magnetoresistance. An increase in magnetoresistance from 1.7% for spin valves with standard Co50Fe50 to 3.3% for spin valves with (Co50Fe50)(75)Al-25 is observed when substituting the same "magnetic" thickness in both the reference and the free layers. The spin-diffusion length for (Co50Fe50)(75)Al-25 is determined to be less than approximately 35 angstrom. Spin-torque measurements show that the spin-torque current density threshold is lower in CoFeAl spin valves compared to standard CoFe spin valves. (C) 2007 American Institute of Physics.

引用

页数：6

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