Control of Spin Current in Artificially Twisted Spin Structures

了解“自旋电流”和“磁化强度”之间的相互作用是发展自旋电子器件的关键问题。在本研究项目中，制备了由硬磁L10-FePT和软磁坡莫合金(FeNi合金)组成的双层膜，并在双层膜中人为地形成了扭曲的自旋结构。研究了双层膜的磁化动力学，并利用双层膜中的自旋波模式发展了一种高效的磁化开关技术。此外，在具有扭曲自旋结构的纳米柱中成功地观察到了电流感生磁化转换。

The understanding of interaction between “spin current" and “magnetization" is an essential issue for the development of spintronic devices. In this research project, bilayers consisting of hard magnetic L10-FePt and soft magnetic Permalloy (FeNi alloy) were prepared, and twisted spin structures were artificially formed in the bilayers. The magnetization dynamics of the bilayers were investigated, and the high efficient magnetization switching technique was developed using the spin wave mode in the bilayers. Also, the current-induced magnetization switching was successfully observed in the nanopillars with a twisted spin structure.