Magneto-Volume and Tetragonal Elongation Effects on Magnetic Phase Transitions of Body-Centered Tetragonal FeRh_<1-x>Pt_x
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概要
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Magnetic properties of FeRh_<1-x>Pt_x system with body-centered cubic and body-centered tetragonal (bct) structures were studied by means of X-ray diffractometry, magnetometry and Mossbauer spectroscopy, and the phase diagram in a temperature-composition plane was determined. With substituting Pt for Rh, the axial ratio c/a was increased and the bct phase was stabilized. With increasing temperature, the bct alloys with 0.72 < x < 0.81 underwent a first-order phase transition from the anti-ferromagnetic state to the ferromagnetic state, while the alloys with 0.3 < x < 0.72 exhibited a first-order phase transition from the antiferromagnetic state to the paramagnetic state with a volume expansion and a tetragonal lattice distortion. The mechanism of those phase transitions was discussed in terms of the magneto-volume and the tetragonal elongation effect.
- 社団法人日本物理学会の論文
- 1994-08-15
著者
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Yuasa Shinji
Department Of Physics Faculty Of Science And Technology Keio University
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Miyajima Hideki
Department Of Physics Faculty Of Science And Technology Keio University
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Otani Yoshichika
Department of Physics, Faculty of Science and Technology, Keio University
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Otani Y
Tohoku Univ. Sendai
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Otani Yoshichika
Department Of Physics Faculty Of Science And Technology Keio University
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Otani YoshiChika
Department of Material Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
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