Crystal Field Effect on Superconducting Transition in Pr<I><SUB>x</SUB></I>Os<SUB>4</SUB>Sb<SUB>12</SUB>

• Tanaka Kenya

  Graduate School of Science, Tokyo Metropolitan University

• Namiki Takahiro

  Graduate School of Science, Tokyo Metropolitan University

• Imamura Atsushi

  Graduate School of Science, Tokyo Metropolitan University

• Ueda Makoto

  Graduate School of Science, Tokyo Metropolitan University

• Saito Takashi

  Graduate School of Science, Tokyo Metropolitan University

• Tatsuoka Sho

  Graduate School of Science, Tokyo Metropolitan University

• Miyazaki Ryouichi

  Graduate School of Science, Tokyo Metropolitan University

• Kuwahara Keitaro

  Institute of Applied Beam Science, Ibaraki University

• Aoki Yuji

  Graduate School of Science, Tokyo Metropolitan University

• Sato Hideyuki

  Graduate School of Science, Tokyo Metropolitan University

Bibliographic Information

Other Title

• Crystal field effect on superconducting transition in Pr[x]Os4Sb12
• Crystal Field Effect on Superconducting Transition in Pr_<i>x</i>Os₄Sb₁₂

Abstract

We have succeeded in growing Pr_xOs₄Sb₁₂ single crystals under high pressure (∼4 GPa) for the first time, where the Pr site filling fraction is supposed to be enhanced. From the systematic measurement of the transport, magnetic, and thermal properties on the grown single crystals, we found a marked decrease in the onset superconducting transition temperature T_c and a considerable increase in the 4f-electron crystal field (CF) energy splitting between the ground state and the first excited state (Δ_CF), compared with those reported on the ambient-pressure grown single crystals. Furthermore, the mass enhancement is reduced in the high-pressure grown samples. The correlation between Δ_CF and both T_c and mass enhancement indicates the crucial role of conduction electron scattering accompanied by the CF excitation in the superconductivity of this compound.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 78 (6), 063701-063701, 2009

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• filled skutterudite
• PrOs<SUB>4</SUB>Sb<SUB>12</SUB>
• high-pressure synthesis
• unconventional superconductivity
• crystal field

Details

• CRID: 1390282679173168384
• NII Article ID: 130005437413
• NII Article ID: 10025960808
• NII Article ID: 210000107818
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.78.063701
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 10252054
• Web Site: http://id.ndl.go.jp/bib/10252054
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10252054
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.78.063701
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed