Thermal Expansion of C14-Laves Phase RMn_2 (R=Y, Gd, Dy and Yb)

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概要

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• The temperature dependence of lattice spacing of metastable C14-Laves phase RMn_2 (R=Y, Gd, Dy and Yb) has been measured up to 300K by X-ray diffraction. Large thermal expansion was observed especially for R=Y and Dy. GdMn_2 shows a structural transition from hexagonal to orthorhombic below 80K accompanied with a volume expansion. This indicates the appearance of a local magnetic moment of Mn 3d electrons with an antiferromagnetic order. The results are discussed together with the data on other stable C14-RMn_2 and metastable C14-TbMn_2. It is shown that the appearance of local magnetic moment of itinerant Mn 3d electrons of C14-RMn_2 at low temperatures is mainly determined by the Mn-Mn distance. C14-YMn_2, TbMn_2 and DyMn_2 are the critical substances for the onset of Mn moment.

• 社団法人日本物理学会の論文
• 1995-12-15

著者

• Nagayama Y

  Research Institute For Applied Mechanics Kyushu University

• Nagashima Y

  Graduate School Of Frontier Sciences The University Of Tokyo

• Nagashima Yoshihiko

  Graduate School Of Frontier Sciences The Univ. Of Tokyo

• Nagashima Yoshihiko

  Research Institute For Applied Mechanics Kyushu University

• Bando Yoshichika

  Institute for Chemical Research, Kyoto University

• INOUE Kazuko

  Faculty of Science and Technology, Ryukoku University

• NAKAMURA Yoji

  Faculty of Science and Technology,Ryukoku University

• Inoue K

  Dept. Of Mechanical And System Engineering Ryukoku Univ.

• Inoue Katsuya

  Institute For Molecular Science And Grad. Univ. Advanced Studies

• Nakamura Yuki

  Department Of Physics Faculty Of Science Hokkaido University

• Nakashima Yousuke

  Graduate School Of Energy Science Kyoto University

• Inoue Kazuko

  Faculty Of Science And Technology Ryukoku University

• Tsvyashchenko V.

  LF Vereshchagin Institute of High Pressure Physics

• Fomicheva L.

  LF Vereshchagin Institute of High Pressure Physics

• Ikeda Yasunori

  Institute for Chemical Research, Kyoto University

• Nakamura Y

  Ryukoku Univ. Otsu

• Nakamura Yoji

  Faculty Of Science And Technology Ryukoku University

• Nakamura Yoji

  Faculity Of Science Kyoto University

• Fomicheva L.

  Lf Vereshchagin Institute Of High Pressure Physics Troisk Moscow Region

• Bando Yoshichika

  Institute For Chemical Research Kyoto University

• Bando Yoshichika

  Institute For Chemical Reaearch Kyoto University

• Ikeda Yasunori

  Institute For Chemical Research Kyoto University

• Nakamura Yoshimichi

  Department Of Materials Engineering Graduate School Of Engineering The University Of Tokyo:crest Jap

• Nakamura Yoshimichi

  Venture Business Laboratory Kyushu University

• L. Fomicheva

  Lf Vereshchagin Institute Of High Pressure Physics Troisk Moscow Region

• Inoue Kazuko

  Faculty Of Pharmaceutical Sciences Okayama University

• Nakamichi Yoyu

  Department Of Physics Faculty Of Science Hokkaido University

• Nakamura Yuji

  Riam Kyushu University

• NAKAMURA Yuji

  Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo:CREST, Japan Science and Technology Corporation

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