Ordering and crossover in a pseudo-sextet localized electron model: possible scenario for SmRu4P12 skutterudite

• Kiss Annamária

  Department of Physics, Tohoku University

• Kuramoto Yoshio

  Department of Physics, Tohoku University

書誌事項

タイトル別名

• Ordering and Crossover in a Pseudo-Sextet Localized Electron Model —Possible Scenario for SmRu<SUB>4</SUB>P<SUB>12</SUB> Skutterudite—
• Ordering and Crossover in a Pseudo-Sextet Localized Electron Model –Possible Scenario for SmRu₄P₁₂Skutterudite–

抄録

A crystalline electric field (CEF) model of localized 4f⁵ electrons is proposed for understanding intriguing ordering phenomena in SmRu₄P₁₂. We take the CEF quartet and doublet (pseudo-sextet) of the Hund’s rule ground state with J=5⁄2, and include intersite interactions between multipoles by the mean-field theory. The model leads to a multipole order with representation Γ_5u, and shows the following features: (i) increasing transition temperature T_MI with increasing magnetic field; (ii) an anomaly in specific heat and other thermodynamic quantities at lower temperature T^\\star, (iii) sharpening of the anomaly at T^\\star as the magnetic field increases. These behaviors reproduce salient features observed experimentally in SmRu₄P₁₂. Possible mechanisms for spontaneous magnetic moment are discussed.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 78 (12), 124702-124702, 2009

  一般社団法人 日本物理学会

キーワード

• skutterudite
• Sm
• crystal-field
• multipole interactions

詳細情報

• CRID: 1390282679173528448
• NII論文ID: 130005437231
• NII論文ID: 210000108128
• NII論文ID: 40016879655
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.78.124702
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 10480514
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10480514
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.78.124702
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
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