Comparison of the use of NiFe and CoFe as electrodes for metallic lateral spin valves

Spin injection and detection in Co60Fe40-based all-metallic lateral spin valves have been studied at both room and low temperatures. The obtained spin signals amplitudes have been compared to those of identical Ni80Fe20-based devices. The replacement of Ni80Fe20 by CoFe allows increasing the spin si...

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Bibliographic Details
Published inNanotechnology Vol. 27; no. 3; p. 035201
Main Authors Zahnd, G, Vila, L, Pham, T V, Marty, A, Laczkowski, P, Savero Torres, W, Beigné, C, Vergnaud, C, Jamet, M, Attané, J-P
Format Journal Article
LanguageEnglish
Published England IOP Publishing 22.01.2016
Institute of Physics
Subjects
Amplitudes
CoFe
Computer simulation
Condensed Matter
Electrodes
Iron compounds
lateral spin valves
Mathematical analysis
Nickel base alloys
Nickel compounds
Physics
spin injection
Spin valves
spintronics
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Summary:Spin injection and detection in Co60Fe40-based all-metallic lateral spin valves have been studied at both room and low temperatures. The obtained spin signals amplitudes have been compared to those of identical Ni80Fe20-based devices. The replacement of Ni80Fe20 by CoFe allows increasing the spin signal amplitude by up to one order of magnitude, thus reaching 50 m at room temperature. The spin signal dependence with the distance between the ferromagnetic electrodes has been analyzed using both a 1D spin-transport model and finite element method simulations. The enhancement of the spin signal amplitude when using CoFe electrodes can be explained by a higher effective polarization.
Bibliography:NANO-108351.R1
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ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/27/3/035201