Measurement of the Spin Absorption Anisotropy in Lateral Spin Valves

The spin absorption process in a ferromagnetic material depends on the orientation relative to magnetization. Using ferromagnet absorb pure current created within lateral valve, we evidence and quantify sizable dependence of Co, CoFe, NiFe. These experiments allow us determine spin-mixing conductance, an elusive but fundamental parameter spin-dependent transport. We show that obtained values cannot be understood model considering only Larmor, transverse decoherence, diffusion lengths, rather suggest conductance is actually limited by Sharvin conductance.