Temperature dependence of a resonance frequency of 59Co NMR in a ferromagnetic Heusler alloy Co2FeSi

H. Nishihara, N. Okui, A. Okubo, T. Kanomata, R. Y. Umetsu, R. Kainuma, T. Sakon

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The temperature dependence of the resonance frequency of 59Co NMR in a ferromagnetic Heusler alloy, Co2FeSi, in zero applied field is reported. The temperature dependence in the range 4.2-300 K has been found to be well described by ν=ν(0)(1-BT3/2) with ν(0)=139.1MHz, and B=5.32×10-6K-3/2, which corresponds to the spin-wave stiffness constant D of 2.60 m eV nm2. The behavior is roughly in agreement with the temperature dependence of the macroscopic magnetization and is consistent with the dominance of the spin-wave excitations in Co2FeSi at low temperatures.

Original languageEnglish
Pages (from-to)208-211
Number of pages4
JournalJournal of Alloys and Compounds
Volume551
DOIs
Publication statusPublished - 2013 Feb 25

Keywords

  • CoFeSi
  • Ferromagnetic Heusler alloy
  • Half-metal
  • Hyperfine field
  • Magnon
  • Spin-wave stiffness constant

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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