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

中文翻译：

---

横向自旋阀中自旋吸收各向异性的测量

铁磁材料中的自旋吸收过程取决于相对于磁化的自旋取向。使用铁磁体吸收侧向自旋阀内产生的纯自旋电流，我们证明并量化了Co，CoFe和NiFe中自旋吸收的相当大的方向依赖性。这些实验使我们能够确定自旋混合电导，这是自旋依赖性转运的一个难以捉摸但基本的参数。我们表明，仅考虑拉莫尔，横向退相干和自旋扩散长度无法在模型中理解获得的值，而是表明自旋混合电导实际上受Sharvin电导的限制。