Sizable spin-transfer torque in the Bi/Ni80Fe20 bilayer film
Sizable spin-transfer torque in the Bi/Ni80Fe20 bilayer film
复制标题
DOI：
10.1063/5.0009798
复制
发表时间：
2020-07
期刊：
影响因子：
--
通讯作者：
Masayuki Matsushima;S. Miwa;S. Sakamoto;T. Shinjo;R. Ohshima;Y. Ando;Y. Fuseya;M. Shiraishi
中科院分区：
文献类型：
--
作者：
Masayuki Matsushima;S. Miwa;S. Sakamoto;T. Shinjo;R. Ohshima;Y. Ando;Y. Fuseya;M. Shiraishi
在Bi中寻找有效的自旋转换已经引起自旋轨道电子学的极大关注。在本工作中，我们采用自旋力矩铁磁共振研究连续变化的Bi/Ni_（80）Fe_（20）（Py）双层膜的自旋转换。与以前的研究相比，相当大的自旋转移扭矩（即，在Bi/Py双层膜中观察到相当大的自旋转换效应。考虑到Bi/钇铁石榴石双层膜中没有自旋转换和Bi掺杂Cu中自旋转换的增强，本研究结果表明材料组合对Bi中产生实质性自旋转换效应的重要性。
The search for efficient spin conversion in Bi has attracted great attention in spin-orbitronics. In the present work, we employ spin-torque ferromagnetic resonance to investigate spin conversion in Bi/Ni80Fe20(Py) bilayer films with continuously varying Bi thickness. In contrast with previous studies, sizable spin-transfer torque (i.e., a sizable spin-conversion effect) is observed in Bi/Py bilayer film. Considering the absence of spin conversion in Bi/yttrium-iron-garnet bilayers and the enhancement of spin conversion in Bi-doped Cu, the present results indicate the importance of material combinations to generate substantial spin-conversion effects in Bi.