Oki Soichiro, Sasaki Yuta, Kasatani Yuichi, Yamada Shinya, Mizukami Shigemi, Nozaki Yukio, Hamaya Kohei
Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, 560-8531, Japan. Center for Spintronics Research Network, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, 560-8531, Japan.
J Phys Condens Matter. 2018 Jun 27;30(25):255802. doi: 10.1088/1361-648X/aac400. Epub 2018 May 11.
Using a laterally configured structure, we demonstrate modulation of the magnetization dynamics of an epitaxial Heusler ferromagnet, FeSi, by nonlocally injecting pure spin currents. From the ferromagnetic resonance signals, the effective Gilbert damping constant ([Formula: see text]) of the epitaxial FeSi nanomagnet is estimated to be ∼0.003 at room temperature. By using the lateral and nonlocal spin injection, the [Formula: see text] value of the epitaxial FeSi nanomagnet can be modulated from 0.0034 to 0.0024. This study will open a way for control of the magnetization dynamics of high-performance ferromagnetic Heusler alloys due to pure spin currents even in laterally configured structures.
通过采用横向配置的结构，我们展示了通过非局部注入纯自旋电流对外延休斯勒铁磁体FeSi的磁化动力学进行调制。从铁磁共振信号估计，外延FeSi纳米磁体在室温下的有效吉尔伯特阻尼常数（[公式：见正文]）约为0.003。通过使用横向和非局部自旋注入，外延FeSi纳米磁体的[公式：见正文]值可从0.0034调制到0.0024。这项研究将为即使在横向配置结构中也能通过纯自旋电流控制高性能铁磁休斯勒合金的磁化动力学开辟一条道路。
