First-principles study of the spin-mixing conductance in Pt/Ni81Fe19 junctions
First-principles study of the spin-mixing conductance in Pt/Ni81Fe19 junctions
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DOI：
10.1063/1.3657144
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发表时间：
2011-10
影响因子：
4
通讯作者：
Qinfang Zhang;S. Hikino;S. Yunoki
中科院分区：
文献类型：
--
作者：
Qinfang Zhang;S. Hikino;S. Yunoki
基于自旋泵浦理论和第一性原理计算，对Pt/坡莫合金（Ni81Fe19，Py）结的自旋混合电导（SMC）进行了理论研究。我们评估 SMC 的理想清洁 Pt/Py 结，并检查界面随机性的影响。我们发现，与理想的清洁结相比，在存在界面粗糙度的情况下，SMC 通常会得到增强。我们估计的 SMC 与最近的 Pt/Py 结实验在定量上非常一致。我们提出了通过在 Pt 中沉积异质磁性金属层来增加 Pt/Py 结中 SMC 的可能途径，为设计未来的自旋电子器件提供了指导。
Based on the spin-pumping theory and first-principles calculations, the spin-mixing conductance (SMC) is theoretically studied for Pt/Permalloy (Ni81Fe19, Py) junctions. We evaluate the SMC for ideally clean Pt/Py junctions and examine the effects of interface randomness. We find that the SMC is generally enhanced in the presence of interface roughness as compared to the ideally clean junctions. Our estimated SMC is in good quantitative agreement with the recent experiment for Pt/Py junctions. We propose possible routes to increase the SMC in Pt/Py junctions by depositing a foreign magnetic metal layer in Pt, offering guidelines for designing the future spintronic devices.