Reducing galvanomagnetic effects in spin pumping measurement with Co₇₅Fe₂₅ as a spin injector

We have investigated dc voltage generation induced by ferromagnetic resonance in a Co₇₅Fe₂₅/Pt film. In order to reduce rectification effects of anisotropic magnetoresistance and the planar Hall effect, which may be observed simultaneously with the inverse spin Hall effect, we selected Co₇₅Fe₂₅ with extremely small anisotropic magnetoresistance as a spin injector. Using the difference in the spectral shape of voltage and in the angle dependence of in-plane magnetization among the effects, we demonstrated that the generated dc voltage is governed by the inverse spin Hall effect induced by spin pumping.