All-metallic lateral spin valves using Co2Fe(Ge0.5Ga0.5) Heusler alloy with a large spin signal

被引：76
作者：
Takahashi, Y. K. [1 ]
Kasai, S. [1 ]
Hirayama, S. [2 ]
Mitani, S. [1 ,2 ]
Hono, K. [1 ,2 ]
机构：
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 05期
关键词：
ROOM-TEMPERATURE; MAGNETORESISTANCE; ACCUMULATION; PRECESSION;
D O I：
10.1063/1.3681804
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A large spin signal (Delta Rs) of 12.8m Omega at room temperature is demonstrated in an all-metallic lateral spin valve (LSV) device comprising of ferromagnetic wire of a highly spin-polarized Co2Fe(Ge0.5Ga0.5) Heusler alloy and a Cu wire. From the results on multi-terminal LSV devices, the origin of the large Delta R-s was concluded to be the high spin polarization of Co2Fe(Ge0.5Ga0.5) and the resultant small spin absorption. The all-metallic LSV device without MgO barrier has low contact resistance, which is considered to be beneficial for a high frequency ultrathin read sensor for the next generation ultrahigh density magnetic recording. (C) 2012 American Institute of Physics. [doi:10.1063/1.3681804]
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页数：4
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