27Al NMR studies of NpPd5Al2

H. Chudo, H. Sakai, Y. Tokunaga, S. Kambe, Dai Aoki, Yoshiya Homma, Y. Shiokawa, Y. Haga, S. Ikeda, T. D. Matsuda, Y. Onuki, H. Yasuoka

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We present 27Al NMR studies for a single crystal of the Np-based superconductor NpPd5Al2(Tc = 4.9 K) . We have observed a five-line 27Al NMR spectrum with a center line and four satellite lines separated by first-order nuclear quadrupole splittings. The Knight shift clearly drops below Tc. The temperature dependence of the 27Al nuclear spin-lattice relaxation rate shows no coherence peak below Tc, indicating that NpPd5Al2 is an unconventional superconductor with an anisotropic gap. The analysis of the present NMR data provides evidence for strong-coupling d-wave superconductivity in NpPd5Al2.

Original languageEnglish
Pages (from-to)3216-3219
Number of pages4
JournalPhysica B: Condensed Matter
Volume404
Issue number19
DOIs
Publication statusPublished - 2009 Oct 15

Keywords

  • Heavy fermion
  • NMR
  • NpPdAl
  • Superconductor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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