Modulation of magnetization dynamics in an epitaxial Heusler ferromagnet due to pure spin current in a laterally configured structure

Soichiro Oki; Yuta Sasaki; Yuichi Kasatani; Shinya Yamada; Shigemi Mizukami; Yukio Nozaki; Kohei Hamaya

doi:10.1088/1361-648X/aac400

Modulation of magnetization dynamics in an epitaxial Heusler ferromagnet due to pure spin current in a laterally configured structure

J Phys Condens Matter. 2018 Jun 27;30(25):255802. doi: 10.1088/1361-648X/aac400. Epub 2018 May 11.

Authors

Soichiro Oki¹, Yuta Sasaki, Yuichi Kasatani, Shinya Yamada, Shigemi Mizukami, Yukio Nozaki, Kohei Hamaya

Affiliation

¹ 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.

PMID: 29749956
DOI: 10.1088/1361-648X/aac400

Abstract

Using a laterally configured structure, we demonstrate modulation of the magnetization dynamics of an epitaxial Heusler ferromagnet, Fe₃Si, by nonlocally injecting pure spin currents. From the ferromagnetic resonance signals, the effective Gilbert damping constant ([Formula: see text]) of the epitaxial Fe₃Si 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 Fe₃Si 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.