73Ge NQR study of superconducting skutterudites MPt 4Ge12 (M = Sr, Ba)

Ko Ichi Magishi, Hitoshi Sugawara, Takahito Saito, Kuniyuki Koyama, Fumiya Kanetake, Hidekazu Mukuda, Yoshio Kitaoka, Kohei M. Itoh, Eugene E. Haller

Research output: Contribution to journalArticle

Abstract

We report on the results of the 73Ge-NQR measurements for MPt4Ge12 (M = Sr, Ba) to clarify the microscopic electronic states and the relationship between superconductivity and rattling. In the normal state, 1/T1 is proportional to temperature, showing a Korringa relation 1/T1T = 0.020 and 0.016 (sK)-1 for SrPt4Ge12 and BaPt4Ge12, respectively. Also, in the superconducting state, 1/T1 shows a distinct coherence peak just below TC, which suggests a conventional BCS superconductor.

Original languageEnglish
Article numberSA028
JournalJournal of the Physical Society of Japan
Volume80
Issue numberSUPPL. A
DOIs
Publication statusPublished - 2011 Jul 1

Keywords

  • Filled skutterudite
  • NQR
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Magishi, K. I., Sugawara, H., Saito, T., Koyama, K., Kanetake, F., Mukuda, H., Kitaoka, Y., Itoh, K. M., & Haller, E. E. (2011). 73Ge NQR study of superconducting skutterudites MPt 4Ge12 (M = Sr, Ba). Journal of the Physical Society of Japan, 80(SUPPL. A), [SA028]. https://doi.org/10.1143/JPSJS.80SA.SA028