High-magnetic-field X-ray absorption spectroscopy of field-induced valence transition in EuNi2(Si1-xGe[x])2

• Matsuda Yasuhiro H.

  Institute for Materials Research, Tohoku University PRESTO, Japan Science and Technology Agency

• Inami Toshiya

  Synchrotron Radiation Research Unit, Japan Atomic Energy Agency

• Ohwada Kenji

  Synchrotron Radiation Research Unit, Japan Atomic Energy Agency

• Murata Yuto

  Graduate School of Natural Science and Technology, Okayama University

• Nojiri Hiroyuki

  Institute for Materials Research, Tohoku University

• Murakami Youichi

  Graduate School of Science, Tohoku University

• Mitsuda Akihiro

  Department of Physics, Kyushu University

• Wada Hirofumi

  Department of Physics, Kyushu University

• Miyazaki Hiroshi

  Graduate School of Natural Science and Technology, Okayama University

• Harada Isao

  Graduate School of Natural Science and Technology, Okayama University

書誌事項

タイトル別名

• High-Magnetic-Field X-ray Absorption Spectroscopy of Field-Induced Valence Transition in EuNi<SUB>2</SUB>(Si<SUB>1−<I>x</I></SUB>Ge<I><SUB>x</SUB></I>)<SUB>2</SUB>
• High-Magnetic-Field X-ray Absorption Spectroscopy of Field-Induced Valence Transition in EuNi₂(Si_1-<i>x</i>Ge_<i>x</i>)₂

抄録

The magnetic-field-induced valence transition in EuNi₂(Si_1−xGe_x)₂ (x=0.82, 0.85) has been studied by X-ray absorption spectroscopy at low temperatures. The field dependence of the Eu valence is directly observed for the first time. We find a significant decrease in the valences at high magnetic fields above 40 T. The valence of Eu changes from v^*=2.75 at a zero field to v^*=2.33 at 40 T for x=0.82. The results are analyzed using a theoretical model. The hybridization parameter V between the Eu²⁺ and Eu³⁺ states and the energy separation ΔE are determined, which are crucial for quantum mechanical mixing.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 77 (5), 054713-054713, 2008

  一般社団法人 日本物理学会

キーワード

• X-ray absorption
• pulsed magnetic field
• valence transition

詳細情報

• CRID: 1390001204197912960
• NII論文ID: 130005436453
• NII論文ID: 110006666013
• NII論文ID: 210000107247
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.77.054713
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 9489372
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9489372
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.054713
• 本文言語コード: en
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