Sm–Sb Bond Length in Mixed-Valence System of SmOs<SUB>4</SUB>Sb<SUB>12</SUB>

• Tsubota Masami

  Synchrotron Radiation Research Unit, Japan Atomic Energy Agency

• Tsutsui Satoshi

  Japan Synchrotron Radiation Research Institute

• Kikuchi Daisuke

  Department of Physics, Tokyo Metropolitan University

• Sugawara Hitoshi

  Faculty of Integrated Arts and Sciences, The University of Tokushima

• Sato Hideyuki

  Department of Physics, Tokyo Metropolitan University

• Murakami Youichi

  Synchrotron Radiation Research Unit, Japan Atomic Energy Agency Department of Physics, Tohoku University

Bibliographic Information

Other Title

• Sm-Sb bond length in mixed-valence system of SmOs4Sb12

Abstract

The detailed crystal structure of a mixed-valent skutterudite SmOs₄Sb₁₂ has been investigated by synchrotron radiation powder diffraction. Although the lattice parameter monotonically decreases with decreasing temperature, Sm–Sb bond length decreases rapidly below 150 K. The temperature dependence of the bond length coincides with that of the change in the valence of the Sm ion. These facts suggest that the hybridization between 4f- and conduction electrons is enhanced at low temperatures. In addition, an isotropic thermal atomic displacement parameter of the Sm ion is much larger than those of the Os and Sb ions. This fact indicates the presence of an anharmonic vibration of Sm ions.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 77 (7), 073601-073601, 2008

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• filled skutterudite
• SmOs<SUB>4</SUB>Sb<SUB>12</SUB>
• powder X-ray diffraction
• heavy fermion
• mixed valence system

Details

• CRID: 1390001204197730944
• NII Article ID: 130005436499
• NII Article ID: 110006821280
• NII Article ID: 210000107300
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.77.073601
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 9576688
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9576688
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.073601
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed