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

doi:10.1016/j.jallcom.2012.10.062

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 journal › Article › peer-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 language	English
Pages (from-to)	208-211
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	551
DOIs	https://doi.org/10.1016/j.jallcom.2012.10.062
Publication status	Published - 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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title = "Temperature dependence of a resonance frequency of 59Co NMR in a ferromagnetic Heusler alloy Co2FeSi",

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.",

keywords = "CoFeSi, Ferromagnetic Heusler alloy, Half-metal, Hyperfine field, Magnon, Spin-wave stiffness constant",

author = "H. Nishihara and N. Okui and A. Okubo and T. Kanomata and Umetsu, {R. Y.} and R. Kainuma and T. Sakon",

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T1 - Temperature dependence of a resonance frequency of 59Co NMR in a ferromagnetic Heusler alloy Co2FeSi

AU - Nishihara, H.

AU - Okui, N.

AU - Okubo, A.

AU - Kanomata, T.

AU - Umetsu, R. Y.

AU - Kainuma, R.

AU - Sakon, T.

PY - 2013/2/25

Y1 - 2013/2/25

N2 - 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.

AB - 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.

KW - CoFeSi

KW - Ferromagnetic Heusler alloy

KW - Half-metal

KW - Hyperfine field

KW - Magnon

KW - Spin-wave stiffness constant

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