Structural Change on the Magnetic Field-Induced Insulator-to-Metal Transition in Distorted Perovskite Eu_0.6Sr_0.4MnO₃

• Nakamura Shin

  Department of Physics, Teikyo University Advanced Research Center of Science and Engineering, Waseda University

• Shimomura Susumu

  Department of Physics, Keio University

• Ikeda Naoshi

  Japan Synchrotron Radiation Research Institute

• Nimori Shigeki

  National Institute for Materials Science

• Takeuchi Takao

  National Institute for Materials Science

• Itoh Kikuo

  National Institute for Materials Science

書誌事項

タイトル別名

• Structural Change on the Magnetic Field-Induced Insulator-to-Metal Transition in Distorted Perovskite Eu0.6Sr0.4MnO3

抄録

Structural feature of Eu_0.6Sr_0.4MnO₃ through the magnetic-field-induced insulator-to-metal (IM) transition has been investigated by X-ray powder diffraction in a magnetic field using synchrotron radiation. No superlattice reflections due to the charge and orbital ordering are detected in the insulator phase down to 20 K. Both of the insulator phase and the induced metal phase are proved to be in orthorhombic structure with Pnma space group, and thus a change of the crystal symmetry is not detected on the IM transition. However, the lattice constants abruptly increase and the reflection intensities abruptly change through the transition. These suggest a rotation of MnO₆ octahedron in a manner to increase Mn–O–Mn angles. This structural change is consistent with a gain in electron transfer energy in the double exchange mechanism that stabilizes the metallic and ferromagnetic state.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 73 (11), 3059-3063, 2004

  一般社団法人 日本物理学会

キーワード

• Eu<SUB>0.6</SUB>Sr<SUB>0.4</SUB>MnO<SUB>3</SUB>
• magnetic field-induced insulator-to-metal transition
• synchrotron radiation
• Mn–O–Mn angle
• double exchange mechanism

詳細情報

• CRID: 1390001204186390144
• NII論文ID: 210000105146
• NII論文ID: 110001979256
• NII論文ID: 130004538616
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.73.3059
• BIBCODE: 2004JPSJ...73.3059N
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 7156979
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7156979
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.73.3059
• 本文言語コード: en
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