Noncollinear Spin Structure in Fe--Ni Invar Alloy Probed by Magnetic EXAFS at High Pressure
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概要
- 論文の詳細を見る
To examine theoretical models of the Invar effect, X-ray magnetic circular dichroism and magnetic extended X-ray absorption fine structure (MEXAFS) measurements are performed under high pressures at the Fe and Ni K-edges in 35.4 at. % Ni--Fe alloy. An oscillatory MEXAFS signal is observed up to 6 GPa. Its amplitude significantly decreases with increasing pressure. The magnetic component of the radial distribution function, obtained by taking the Fourier transform, shows a different reduction in the ferromagnetic correlations of Fe and Ni absorbing atoms. The present results are favorable to the noncollinear spin structure picture rather than the Fe 2\gamma-state model.
- 2011-02-15
著者
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MIZUMAKI Masaichiro
Japan Synchrotron Radiation Research Institute
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Kawamura Naomi
Japan Synchrotron Radiation Research Institute
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MARUYAMA Hiroshi
Graduate School of Science, Hiroshima University
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Irifune Tetsuo
Geodynamics Research Center Ehime University
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Mizumaki Masaichiro
Japan Synchrotron Radiation Research Institute, SPring-8, Sayo, Hyogo 679-5198, Japan
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Matsumoto Ken
Graduate School of Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
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Ishimatsu Naoki
Graduate School of Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
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Sumiya Hitoshi
Electronics and Materials R&D Laboratories, Sumitomo Electric Industries, Itami, Hyogo 664-0016, Japan
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Ishimatsu Naoki
Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 739-8526, Japan
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Sumiya Hitoshi
Electronics and Materials R&D Laboratories, Sumitomo Electric Industries, Itami, Hyogo 664-0016, Japan
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