Abstract High efficient nonmagnetic materials for generating and detecting spin currents are extremely sought after for prospective spintronic devices. We investigate the spin pumping and inverse spin Hall effects (ISHE) in Y3Fe5O12 (YIG)/ Pt1-xSnx (x = 0.06, 0.11, 0.17, 0.23, 0.28) bilayer using a coplanar waveguide based broadband ferromagnetic resonance setup. We find that the measured effective spin mixing conductance g eff ↑ ↓ and spin Hall angle θSH strongly correlate with the Sn content. A large spin Hall angle θSH = 0.089 ± 0.001 is obtained in a Pt0.77Sn0.23 alloy film while θSH = 0.055 ± 0.001 in pure Pt thin film under the same conditions. This enhancement of spin Hall angle is due to skew scattering from the Sn impurities resulting from spin-orbit interaction. Meanwhile, the spin Hall (SH) resistivity of the spin current induced by Sn impurities in Pt has been revealed. The SH resistivity of Pt1-xSnx remain pretty low values (0.17–1.1 × 10−9 Ω⋅m), which are promising for construct high-speed spintronic devices exploiting the spin Hall effect.

中文翻译：

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室温下非磁性 PtSn 合金薄膜的大自旋霍尔角

摘要 用于产生和检测自旋电流的高效非磁性材料在未来的自旋电子器件中备受追捧。我们使用基于共面波导的宽带铁磁共振装置研究了 Y3Fe5O12 (YIG)/Pt1-xSnx (x = 0.06, 0.11, 0.17, 0.23, 0.28) 双层中的自旋泵浦和反自旋霍尔效应 (ISHE)。我们发现测量的有效自旋混合电导 g eff ↑ ↓ 和自旋霍尔角 θSH 与 Sn 含量密切相关。在相同条件下，在 Pt0.77Sn0.23 合金膜中获得大自旋霍尔角 θSH = 0.089 ± 0.001，而在纯 Pt 薄膜中获得 θSH = 0.055 ± 0.001。自旋霍尔角的这种增强是由于自旋轨道相互作用导致的 Sn 杂质的偏斜散射。同时，已经揭示了由 Pt 中的 Sn 杂质引起的自旋电流的自旋霍尔 (SH) 电阻率。Pt1-xSnx 的 SH 电阻率保持相当低的值（0.17–1.1 × 10−9 Ω⋅m），这对于构建利用自旋霍尔效应的高速自旋电子器件很有希望。