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Electrical injection of spin-polarized electrons and electrical detection of dynamic nuclear polarization using a Heusler alloy spin source
Physical Review B
We demonstrated electrical spin injection from a half-metallic Heusler alloy Co 2 MnSi electrode into a GaAs channel through observation of a spin-valve signal and a Hanle signal in the four-terminal nonlocal geometry. Furthermore, we electrically detected a nuclear field acting on electron spins, which was produced by the dynamic nuclear polarization, through observation of transient oblique Hanle signals. Samples with a Co 2 MnSi spin source exhibited higher spin-injection efficiency and adoi:10.1103/physrevb.87.235205 fatcat:vetvcz6bz5brbd5cx2qoxsgvee