Enhanced spin signal in nonlocal devices based on a ferromagnetic CoFeAl alloy
Enhanced spin signal in nonlocal devices based on a ferromagnetic CoFeAl alloy
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DOI：
10.1063/1.3635391
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发表时间：
2011-09-05
影响因子：
4
通讯作者：
Valenzuela, S. O.
中科院分区：
文献类型：
--
作者：
Bridoux, G.;Costache, M. V.;Valenzuela, S. O.
我们系统地研究了基于CoFeAl注入器和探测器的横向自旋阀中的非定域自旋信号，并将结果与基于CoFe的完全相同的器件进行了比较。该器件是在室温下用电子束蒸发法制备的。我们在CoFeAl器件中观察到自旋信号的> 10倍增强。我们解释这种增加是由于形成了一个高度自旋极化的Co2 FeAl Heusler化合物与大的电阻率。这些结果表明，Heusler化合物是有前途的候选人作为自旋极化电极的横向自旋器件的未来自旋电子学的应用。(C)2011年美国物理学会。[doi：10.1063/1.3635391]
We systematically study the nonlocal spin signal in lateral spin valves based on CoFeAl injectors and detectors and compare the results with identically fabricated devices based on CoFe. The devices are fabricated by electron beam evaporation at room temperature. We observe a > 10-fold enhancement of the spin signal in the CoFeAl devices. We explain this increase as due to the formation of a highly spin-polarized Co2FeAl Heusler compound with large resistivity. These results suggest that Heusler compounds are promising candidates as spin polarized electrodes in lateral spin devices for future spintronic applications. (C) 2011 American Institute of Physics. [doi:10.1063/1.3635391]