First-principles study of spin-wave dispersion in Sm(Fe1−xCox)12

•Spin-wave dispersion in Sm(Fe1−xCox)12 calculated based on first-principles is presented.•Spin-waves propagate more easily along a*-axis than along c*-axis, especially in SmFe12.•The calculated values of spin-wave stiffness are in good agreement with the experimental value. We present spin-wave dis...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2019-01, Vol.469, p.296-301
Main Authors: Fukazawa, Taro, Akai, Hisazumi, Harashima, Yosuke, Miyake, Takashi
Format: Article
Language:English
Subjects:
First-principles calculation
Hard-magnet compounds
Sm(Fe,Co)12
Spin-wave
ThMn12 structure
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Summary:•Spin-wave dispersion in Sm(Fe1−xCox)12 calculated based on first-principles is presented.•Spin-waves propagate more easily along a*-axis than along c*-axis, especially in SmFe12.•The calculated values of spin-wave stiffness are in good agreement with the experimental value. We present spin-wave dispersion in Sm(Fe1−xCox)12 calculated from first-principles. Anisotropy in the lowest branch of the spin-wave dispersion around the Γ point is discussed. It is shown that spin-waves propagate more easily along a∗-axis than along c∗-axis, especially in SmFe12. We also compare values of the spin-wave stiffness with those obtained from an experiment. The calculated values are in good agreement with the experimental values.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2018.08.071