NMR and Specific Heat Investigations in RRh<SUB>4</SUB>B<SUB>4</SUB> (R=Y, Gd, Tb, Dy, Ho and Er)

  • Kumagai Ken-ichi
    Department of Material Physics, Faculty of Engineering Science, Osaka University
  • Inoue Yuji
    Department of Material Physics, Faculty of Engineering Science, Osaka University
  • Asayama Kunisuke
    Department of Material Physics, Faculty of Engineering Science, Osaka University

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A small specific heat jump at superconducting transition in YRh4B4 and small magnetic contribution to the entropy in magnetically ordered state in RRh4B4 (R=Tb, Dy, Ho and Er) have been observed. Hyperfine field of Gd in GdRh4B4 is largly anisotropic forming a powder pattern in NMR spectrum. The broadened NMR spectra of 11B are observed in the magnetically ordered compounds. The polarization of the conduction electrons at B site is found to be very small.

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