Anisotropic intrinsic damping constant of epitaxial Co2MnSi heusler alloy films

Resul Yilgin, Yuya Sakuraba, Mikihiko Oogane, Shigemi Mizukami, Yasuo Ando, Terunobu Miyazaki

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

We investigated the Gilbert damping constant of the Heusler Co 2MnSi(001) films epitaxially grown on a MgO(100) substrate by a ferromagnetic resonance technique. The angular variation in resonance field in the in-plane geometry exhibited a maximum when the field was applied parallel to the [110] direction (easy axis), and its relative minimum corresponded to the H ∥ [100] hard axis. Experimental results were fitted with theoretical results; the g-value, effective magnetization and anisotropy constants were determined. The magneto-crystalline anisotropy of the films decreased after the films were postannealed at 400°C. The Gilbert damping parameter was anisotropic and had a minimum value at 300°C.

Original languageEnglish
Pages (from-to)L205-L208
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume46
Issue number8-11
DOIs
Publication statusPublished - 2007 Mar 9

Keywords

  • Ferromagnetic resonance
  • Gilbert damping
  • Half metallic
  • Heusler alloy

ASJC Scopus subject areas

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

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