All-metal lateral spin valve operated by spin pumping

摘要

We present lateral spin-valve measurements where spin pumping serves as the spin current injection mechanism. The first electrode is excited at ferromagnetic resonance and the voltage drop between the interconnecting nonmagnetic channel and the second electrode with static magnetization is detected. We find a voltage difference of 10 nV between parallel and antiparallel magnetization alignment of the electrodes caused by spin-dependent differences in the chemical potential. The experimental value is in good agreement with a theoretical estimation of 12 nV. Our interpretation of the voltage signals is supported by simultaneous broadband-ferromagnetic resonance measurements.