Heavy fermion state in YbIr2Zn20

• Yoshiuchi Shingo

  Graduate School of Science, Osaka University

• Toda Masatoshi

  Graduate School of Science, Osaka University

• Matsushita Masaki

  Graduate School of Science, Osaka University

• Yasui Shinichi

  Graduate School of Science, Osaka University

• Hirose Yusuke

  Graduate School of Science, Osaka University

• Ohya Masahiro

  Graduate School of Science, Osaka University

• Katayama Keisuke

  Graduate School of Science, Osaka University

• Honda Fuminori

  Graduate School of Science, Osaka University

• Sugiyama Kiyohiro

  Graduate School of Science, Osaka University

• Hagiwara Masayuki

  KYOKUGEN, Osaka University

• Kindo Koichi

  ISSP, University of Tokyo

• Takeuchi Tetsuya

  Low Temperature Center, Osaka University

• Yamamoto Etsuji

  Advanced Science Research Center, Japan Atomic Energy Agency

• Haga Yoshinori

  Advanced Science Research Center, Japan Atomic Energy Agency

• Settai Rikio

  Graduate School of Science, Osaka University

• Tanaka Toshiki

  Department of Physics, College of Humanities and Sciences, Nihon University

• Kubo Yasunori

  Department of Physics, College of Humanities and Sciences, Nihon University

• Onuki Yoshichika

  Graduate School of Science, Osaka University Advanced Science Research Center, Japan Atomic Energy Agency

書誌事項

タイトル別名

• Heavy Fermion State in YbIr<SUB>2</SUB>Zn<SUB>20</SUB>

抄録

We measured the high-field magnetization and de Haas–van Alphen (dHvA) oscillations for YbIr₂Zn₂₀ with a cubic crystal structure, together with the electrical resistivity and magnetic susceptibility. The magnetic susceptibility χ with an effective magnetic moment of Yb³⁺ becomes temperature-independent at low temperatures, with a broad peak at T_χmax=7.4 K for H||‹110›. The corresponding magnetization indicates a metamagnetic transition at H_m=120 kOe, consistent with a T_χmax vs H_m relation in the Ce- and U-based heavy fermion compounds. The large cyclotron masses of 4–27 m₀ are detected in the dHvA experiment, and are found to be reduced at magnetic fields higher than H_m=120 kOe. The resistivity follows the Fermi liquid relation ρ=ρ₀+AT² under magnetic field, and the \\sqrtA value is also found to have a maximum at H_m as a function of magnetic field. From the present experimental results, together with the results of 4f-itinerant energy band calculations, the 4f electrons are found to contribute to the heavy fermion state in YbIr₂Zn₂₀.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 78 (12), 123711-123711, 2009

  一般社団法人 日本物理学会

キーワード

• YbIr<SUB>2</SUB>Zn<SUB>20</SUB>
• heavy fermion metamagnetism
• de Haas–van Alphen effect
• Fermi surface

詳細情報

• CRID: 1390001204196796416
• NII論文ID: 130005437192
• NII論文ID: 210000108111
• NII論文ID: 40016879638
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.78.123711
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 10480126
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10480126
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.78.123711
• 本文言語コード: en
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