Structure and transport properties of current-perpendicular-to-plane spin valves using Co2FeAl0.5Si0.5 and Co2MnSi Heusler alloy electrodes

被引：27

作者：

Furubayashi, T. ^{[1
]}

Kodama, K. ^{[2
]}

Nakatani, T. M. ^{[2
]}

Sukegawa, H. ^{[1
]}

Takahashi, Y. K. ^{[1
]}

Inomata, K. ^{[1
]}

Hono, K. ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Magnet Mat Ctr, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 11期

关键词：

aluminium alloys; cobalt alloys; iron alloys; magnetic epitaxial layers; magnetic multilayers; magnetoresistance; manganese alloys; silicon alloys; silver; spin valves; transmission electron microscopy; MAGNETORESISTANCE; ELEMENT;

D O I：

10.1063/1.3431530

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the structure and transport properties of current-perpendicular-to-plane spin valves (CPP SVs) with Co2FeAl0.5Si0.5 (CFAS) or Co2MnSi (CMS) Heusler alloy magnetic layers and an Ag or Cu spacer layer. A multilayer stack of sub/Cr/Ag/Heusler/(Ag or Cu)/Heusler/Co75Fe25/Ir22Mn78/Ru was deposited on a MgO(001) single crystalline substrate by magnetron sputtering. Transmission electron microscopy observations showed epitaxial growth from the substrate to the top Heusler layer. The CPP SV with a CFAS/Ag/CFAS trilayer showed relatively large magnetoresistance (MR) ratios of 12% at room temperature and 31% at 12 K, with monotonous temperature dependence. However, the MR values of the SV with the CMS/Ag/CMS trilayer showed a different temperature dependence with a maximum value of 22% at 100 K. This might be related to the 90 degrees couplings between the two CMS layers. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3431530]

引用

页数：7

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