Anomalous magnetic phase in an undistorted pyrochlore oxide Cd2Os2O7 induced by geometrical frustration

• Koda Akihiro

  Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) Department of Materials Structure Science, The Graduate University for Advanced Studies (SOKENDAI)

• Kadono Ryosuke

  Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) Department of Materials Structure Science, The Graduate University for Advanced Studies (SOKENDAI)

• Ohishi Kazuki

  Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)

• Saha Shanta R.

  Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)

• Higemoto Wataru

  Advanced Science Research Center, Japan Atomic Energy Agency

• Yonezawa Shigeki

  Institute for Solid State Physics, University of Tokyo

• Muraoka Yuji

  Institute for Solid State Physics, University of Tokyo

• Hiroi Zenji

  Institute for Solid State Physics, University of Tokyo

書誌事項

タイトル別名

• Anomalous Magnetic Phase in an Undistorted Pyrochlore Oxide Cd<SUB>2</SUB>Os<SUB>2</SUB>O<SUB>7</SUB> Induced by Geometrical Frustration

抄録

We report on the muon spin rotation/relaxation study of a pyrochlore oxide, Cd₂Os₂O₇, which exhibits a metal–insulator (MI) transition at T_MI\\simeq225 K without structural phase transition. It reveals strong spin fluctuation (≥10⁸ s⁻¹) below the MI transition, suggesting a predominant role of geometrical spin frustration amongst Os⁵⁺ ions. Meanwhile, upon further cooling, an incommensurate spin density wave discontinuously develops below T_SDW\\simeq150 K. These observations strongly suggest the occurrence of an anomalous magnetic transition and associated change in the local spin dynamics in undistorted pyrochlore antiferromagnet.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 76 (6), 063703-063703, 2007

  一般社団法人 日本物理学会

キーワード

• μSR
• strongly correlated electron
• metal–insulator transition
• SDW
• frustrated magnetism

詳細情報

• CRID: 1390001204194316416
• NII論文ID: 130005296851
• NII論文ID: 110006342577
• NII論文ID: 210000106713
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.76.063703
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 8769326
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8769326
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.76.063703
• 本文言語コード: en
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