High-Temperature Magnetic Investigations on Uranium Compounds

• Galatanu Andrei

  Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai

• Haga Yoshinori

  Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai

• Matsuda Tatsuma D.

  Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai

• Ikeda Shugo

  Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai Graduate School of Science, Osaka University, Toyonaka

• Yamamoto Etsuji

  Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai

• Aoki Dai

  Institute for Materials Research, Tohoku University

• Takeuchi Tetsuya

  Low Temperature Center, Osaka University, Toyonaka Research Center for Materials Science at Extreme Conditions, Osaka University

• Onuki Yoshichika

  Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai Graduate School of Science, Osaka University, Toyonaka

抄録

We investigated the magnetic property of typical uranium compounds by measuring the magnetic susceptibility in an extended temperature range up to about 800 K. The magnetic susceptibility follows the Curie–Weiss law for a localized 5f²-electron compound UPd₃ and a ferromagnetic insulator UFe₄P₁₂. In most of the investigated compounds we observed a crossover effect of the 5f electrons from a low-temperature itinerant nature to a high-temperature localized one. This is found to be characteristic for ferromagnetic superconductors such as UGe₂ and UIr, and also for antiferromagnets like USb₂ or UNiSb₂. To assess an extension of this characteristic property in the uranium compounds we also investigated typical 5f-itinerant compounds like UGa₃ and UPtGa₅. The crossover effect is essentially important in heavy fermion compounds such as UPt₃, UPd₂Al₃ and URu₂Si₂. Even in the paramagnetic compound of UB₄, the magnetic susceptibility is not temperature-independent, but approaches a 5f-localized tendency at high temperatures. Since the samples were single crystals, we were also able to trace the evolution of the magnetic anisotropy. The high-temperature anisotropic susceptibility data were analyzed on the basis of the crystalline electric field scheme.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 74 (5), 1582-1597, 2005

  一般社団法人 日本物理学会

キーワード

• magnetic susceptibility
• 5<I>f</I> configurations
• uranium compounds

詳細情報

• CRID: 1390282679163923072
• NII論文ID: 210000105457
• NII論文ID: 110001979576
• NII論文ID: 130004539217
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.74.1582
• BIBCODE: 2005JPSJ...74.1582G
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 7310823
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7310823
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.74.1582
• 本文言語コード: en
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