Large anisotropy of Gilbert damping constant in L21-ordered Co2FeSi film

Yuichi Kasatani, Shinya Yamada, Hiroyoshi Itoh, Masanobu Miyao, Kohei Hamaya, Yukio Nozaki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We experimentally demonstrated anisotropic damping of the magnetization dynamics in a highly ordered Heusler compound Co3-xFexSi (x = 1.0, 2.0, and 3.0). The field-swept ferromagnetic resonance linewidth as a function of the resonant frequency was measured to exclude extrinsic contributions from two-magnon scattering and inhomogeneous line-broadening. In L21-ordered Co2FeSi film, a wide variation in the intrinsic Gilbert damping constant from 0.0023 to 0.0061 was clearly observed in the (111) plane, where a weak uniaxial magnetic anisotropy was formed via low-temperature epitaxial growth. The large anisotropy of the Gilbert damping constant was suppressed by increasing x, which suppresses the halfmetallicity in Co3-xFexSi films.

Original languageEnglish
Number of pages1
JournalApplied Physics Express
Volume7
Issue number12
DOIs
Publication statusPublished - 2014 Dec 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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