A Microscopic Model for Ferromagnetism of UGe₂

• Hirohashi Kyuichi

  Institute for Solid State Physics, University of Tokyo

• Ueda Kazuo

  Institute for Solid State Physics, University of Tokyo

書誌事項

タイトル別名

• A Microscopic Model for Ferromagnetism of UGe2
• Microscopic Model for Ferromagnetism of UGe2

抄録

We construct a microscopic Hamiltonian for the ferromagnetism of UGe₂ by taking account of the orbital degeneracy of the 5-f electrons and investigate possible phases by the Hartree–Fock approximation. We reduce the number of mean values to be determined by assuming the magnetic orders where the coplanar magnetic moments perpendicular to the c-axis constitute an a-axis moment as a whole. Because of the orbital degeneracy, the anisotropies of the crystalline electric field term and the hopping term competes with each other. Moreover occupation number in each atomic orbit is sensitive to the relation between the crystalline electric field and the Coulomb interaction. In consequence, a rich ground state phase diagram with various different ferromagnetic orders is obtained.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 73 (6), 1576-1586, 2004

  一般社団法人 日本物理学会

キーワード

• UGe<SUB>2</SUB>
• ferromagnetism
• orbital degeneracy
• Hartree–Fock approximation

詳細情報

• CRID: 1390282679162546816
• NII論文ID: 210000104863
• NII論文ID: 110001974422
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.73.1576
• BIBCODE: 2004JPSJ...73.1576H
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 6973910
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6973910
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.73.1576
• 本文言語コード: en
• データソース種別:
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