Co2MnGe-based current-perpendicular-to-the-plane giant-magnetoresistance spin-valve sensors for recording head applications

被引：79

作者：

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

Maat, S. ^{[1
]}

Chandrashekariaih, S. ^{[1
]}

Katine, J. A. ^{[1
]}

Chen, W. ^{[1
]}

York, B. ^{[1
]}

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

机构：

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

来源：

JOURNAL OF APPLIED PHYSICS | 2011年 / 109卷 / 09期

关键词：

1ST-PRINCIPLES; PERMALLOY; ALLOYS;

D O I：

10.1063/1.3563578

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetic and magnetotransport properties of current-perpendicular-to-the-plane (CPP) giant-magnetoresistance (GMR) spin-valve sensors containing the Heusler alloy Co2MnGe are presented. The geometrical and head integration constraints which exist for recording head applications are discussed and dictate various design compromises which determine the final device properties. Here we show that even for small total sensor thicknesses 400 angstrom and anneal temperatures < 250 degrees C we can obtain CPP-GMR signal levels up to Delta RA = 4 m Omega-mu m(2) at room temperature when inserting Co2MnGe in both the free layer and reference layers of the spin valve. Output levels increase to 10 m Omega-mu m(2) when reducing the temperature below 100 K, demonstrating the strong temperature dependence of the spin-dependent scattering in the Co2MnGe-based magnetic layers. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3563578]

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页数：11

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