论文标题
界面不对称旋转散射的证据
Evidence of interfacial asymmetric spin scattering at ferromagnet-Pt interfaces
论文作者
论文摘要
我们通过铁磁/PT纳米版本中的自旋霍尔效应测量自旋电荷互连。当假设FM元件的透明接口和散发旋转注射/检测的大量起源时，PT的提取的有效自旋霍尔角（SHA）用铁磁（FM）材料（COFE，CO和Nife）急剧进化。通过仔细测量接口电阻，我们表明它很大，不能忽略。然后，我们证明FM/PT界面处的自旋注射/检测是由接口的自旋极化主导的。我们表明，界面不对称自旋散射成为样品中自旋注射的驱动机制。
We measure the spin-charge interconversion by the spin Hall effect in ferromagnetic/Pt nanodevices. The extracted effective spin Hall angles (SHAs) of Pt evolve drastically with the ferromagnetic (FM) materials (CoFe, Co, and NiFe), when assuming transparent interfaces and a bulk origin of the spin injection/detection by the FM elements. By carefully measuring the interface resistance, we show that it is quite large and cannot be neglected. We then evidence that the spin injection/detection at the FM/Pt interfaces are dominated by the spin polarization of the interfaces. We show that interfacial asymmetric spin scattering becomes the driving mechanism of the spin injection in our samples.
