A Novel Pyrochlore Ruthenate: Ca₂Ru₂O₇

• Munenaka Taiya

  Department of Physics, Chuo University

• Sato Hirohiko

  Department of Physics, Chuo University

書誌事項

タイトル別名

• A Novel Pyrochlore Ruthenate: Ca2Ru2O7
• Novel Pyrochlore Ruthenate Ca2Ru2O7

抄録

Single crystals of a novel ruthenate, Ca₂Ru₂O₇, were obtained. An X-ray diffraction study on a single crystal revealed that this material crystallizes in a pyrochlore structure with a lattice parameter, a=10.197 Å. The magnetic susceptibility above 30 K is the summation of a Curie–Weiss contribution and a constant term independent of temperature. The effective moment per Ru atom is only 0.36 μ_B, one order of magnitude smaller than that expected from a localized spin model with S=3⁄2 for Ru⁵⁺. Below 23 K, the localized spins freeze in a spin-glass state. The resistivity at room temperature is 2×10⁻³ Ω·cm, comparable to that in metallic, highly correlated oxides.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 75 (10), 103801-, 2006

  一般社団法人 日本物理学会

キーワード

• ruthenate
• pyrochlore
• magnetism
• electric conduction
• spin glass

詳細情報

• CRID: 1390001204190087680
• NII論文ID: 110004821499
• NII論文ID: 210000106348
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.75.103801
• BIBCODE: 2006JPSJ...75j3801M
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 8085104
• Web Site: http://id.ndl.go.jp/bib/8085104
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8085104
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.75.103801
• 本文言語コード: en
• データソース種別:
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