Structural and Magnetic Properties of Fe2P under Pressure at Low Temperature
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概要
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We have carried out X-ray diffraction and 57Fe nuclear forward scattering using synchrotron radiation to study structural and magnetic properties of Fe2P under high pressure at low temperature. The lattice parameter ratio changes at 1.8 and 7.0 GPa as a function of pressure at 24 K without structural change, where the transition at 1.8 GPa corresponds to a ferromagnetic-to-antiferromagnetic one. We deduced the magnetic structures of Fe2P at 3 K and 2.5 GPa from refined hyperfine interaction parameters extracted from 57Fe nuclear forward scattering spectra. Without external magnetic field where Fe2P is in the antiferromagnetic state, the magnetic structure is a complex one with a propagation vector along \langle 100 \rangle. The distinct change of 57Fe nuclear forward scattering spectra with external magnetic field along [001] indicates that a metamagnetic-like transition occurs below 5 kOe at 3 K and 2.5 GPa. With external magnetic field, the magnetic structures are not simple collinear ones. Furthermore, the magnetic-field-induced change in the magnetic structure occurs at around 40 kOe.
- 2011-08-15
著者
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OHISHI Yasuo
Japan Synchrotron Radiation Research Institute
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Uwatoko Yoshiya
Institute For Solid State Physics (issp) The University Of Tokyo
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Fujii Hironobu
Faculty Of General Education Hiroshima University
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Umemura Junpei
Graduate School Of Material Science University Of Hyogo
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Sakai Nobuhiko
Graduate School And Faculty Of Science Himeji Institute Of Technology
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KOBAYASHI Hisao
Graduate School and Faculty of Science, University of Hyogo
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Uwatoko Yoshiya
Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Zhan Xiao-Wei
Photon Factory, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
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Ohishi Yasuo
Japan Synchrotron Radiation Institute, Sayo, Hyogo 679-5198, Japan
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Umemura Junpei
Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
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Sakai Nobuhiko
Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
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Fujii Hironobu
Faculty of Integrated Arts and Sciences, Hiroshima University, Higashihiroshima, Hiroshima 739-0046, Japan
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Uwatoko Yoshiya
Institute for Solid State Physics
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