Magnetic Structure of Sr₂MnO_3.5

• Kato Chihiro

  Department of Physics, Nagoya University

• Iikubo Satoshi

  Department of Physics, Nagoya University

• Soda Minoru

  Department of Physics, Nagoya University

• Sato Masatoshi

  Department of Physics, Nagoya University

• Kakurai Kazuhisa

  Advanced Science Research Center, JAERI

• Yoshii Shunsuke

  KYOKUGEN, Osaka University

書誌事項

タイトル別名

• Magnetic Structure of Sr2MnO3.5

抄録

Magnetic behavior of Sr₂MnO_3.5 has been studied by measuring the magnetic susceptibility χ, high-field magnetization and specific heat C. The spin structure has also been studied by means of the powder neutron diffraction. The system has the two-dimensional linkage of corner-sharing MnO₅ pyramids derived by regularly reducing the oxygen atoms from the MnO₂ layers of Sr₂MnO₄. The oxygen shared by two neighboring pyramids belongs, in one case, to the basal planes of both pyramids, or in another case, to the basal plane of one pyramid and the apex of another one. Due to the existence of these two kinds of the bridging oxygens, it provides a quite characteristic example of moment systems with ferromagnetic (F) clusters of four Mn³⁺ moments, which are interacting with the neighboring clusters in the antiferromagnetic (AF) way. The results of the studies are as follows. The Neel temperature T_N is 126 K. The exchange interactions corresponding to the two kinds of the bridging oxygens are estimated by the high temperature expansion method to be −50.9 K (AF) and 18.7 K (F), where the signs are in agreement with our expectation. The magnetic structure is consistent with the picture of interacting clusters, though the F-interaction is weaker than the AF one. It is collinear AF one with the moments along the b axis.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 74 (3), 1026-1029, 2005

  一般社団法人 日本物理学会

キーワード

• Sr<SUB>2</SUB>MnO<SUB>3.5</SUB>
• neutron diffraction
• specific heat
• magnetic structure

詳細情報

• CRID: 1390282679162688768
• NII論文ID: 210000105355
• NII論文ID: 110001979484
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.74.1026
• BIBCODE: 2005JPSJ...74.1026K
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 7282758
• Web Site: http://id.ndl.go.jp/bib/7282758
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7282758
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.74.1026
• 本文言語コード: en
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