scholarly journals Spin injection into multilayer graphene from highly spin-polarized Co2FeSi Heusler alloy

2016 ◽  
Vol 9 (6) ◽  
pp. 063006 ◽  
Author(s):  
Takehiro Yamaguchi ◽  
Rai Moriya ◽  
Soichiro Oki ◽  
Shinya Yamada ◽  
Satoru Masubuchi ◽  
...  
Keyword(s):  
Heusler Alloy ◽  
Spin Injection ◽  
Multilayer Graphene ◽  
Spin Polarized

Spin Injection into Graphene from Heusler Alloy Co2MnGe (111) Surface: A First Principles Study

2018 ◽  
Vol 914 ◽  
pp. 111-116 ◽  
Author(s):  
Ya Xin Wang ◽  
Tong Sheng Xia
Keyword(s):  
First Principles ◽  
Heusler Alloy ◽  
Spin Injection ◽  
Ferromagnetic Material ◽  
Nonequilibrium State ◽  
Tunnel Barrier ◽  
Injection Efficiency ◽  
Spintronic Devices ◽  
First Principles Study ◽  
Spin Polarized

To obtain a larger spin signal for use in graphene-based spintronic devices, the spin injection efficiency needs to be enhanced. Previously researchers can increase the efficiency by inserting a tunnel barrier such as Al2O3or MgO between ferromagnet and graphene. However, the key value in spin transport is still very low because of the conductance mismatch as well as the limit to fabricate a high-quality tunnel barrier at the junction surface. Here we use a highly spin-polarized ferromagnetic material—Heusler alloy Co2MnGe as a substitutional scheme without the tunnel barrier. The spin injection efficiency of our Co2MnGe (111)/graphene junction can be as high as 73% which is much higher than 1% of ferromagnet/graphene or 30% of ferromagnet/oxide/graphene using first-principles study. The large spin polarization can be explicated by analyzing the transmission spectrum at the nonequilibrium state.

Effective modulation of spin accumulation using a ferromagnetic/nonmagnetic bilayer spin channel

2021 ◽  
Author(s):  
Taisei Ariki ◽  
Tatsuya Nomura ◽  
Kohei Ohnishi ◽  
Takashi Kimura
Keyword(s):  
Spin Injection ◽  
Spin Valve ◽  
Transverse Spin ◽  
Spin Accumulation ◽  
Spin Channel ◽  
Relative Angle ◽  
Channel Layer ◽  
Spin Polarized ◽  
Resistance Model ◽  
Large Spin

Abstract A lateral spin valve consisting of highly spin-polarized CoFeAl electrodes with a CoFeAl/Cu bilayer spin channel has been developed. Despite a large spin absorption into the CoFeAl capping channel layer, an efficient spin injection and detection using the CoFeAl electrodes enable us to observe a clear spin valve signal. We demonstrate that the nonlocal spin accumulation signal is significantly modulated depending on the relative angle of the magnetizations between the spin injector and absorber. The observed modulation phenomena is explained by the longitudinal and transverse spin absorption effects into the CoFeAl channel layer with the spin resistance model.

Erratum: “Spin polarized carrier injection from full Heusler alloy Co2MnSi into superconduting NbN,” [Appl. Phys. Lett. 102, 112409 (2013)]

2013 ◽  
Vol 103 (18) ◽  
pp. 189902
Author(s):  
Dushyant Kumar ◽  
P. C. Joshi ◽  
Z. Hossain ◽  
R. C. Budhani
Keyword(s):  
Heusler Alloy ◽  
Carrier Injection ◽  
Spin Polarized ◽  
Full Heusler
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