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Positive muon Knight shift and spin relaxation in heavy fermion superconductors UPt3 and UBe13

  • Author(s): Luke, GM;
  • Le, LP;
  • Sternlieb, BJ;
  • Wu, WD;
  • Uemura, YJ;
  • Brewer, JH;
  • Kadono, R;
  • Kiefl, RF;
  • Kreitzman, SR;
  • Riseman, TM;
  • Dalichaouch, Y;
  • Lee, BW;
  • Maple, MB;
  • Seaman, CL;
  • Armstrong, PE;
  • Ellis, RW;
  • Fisk, Z;
  • Smith, JL
  • et al.

We report muon spin rotation/relaxation (μSR) measurements of the heavy fermion superconductors UBe13 and UPt3. In both materials we find that the muon Knight shift is unchanged in the superconducting state, consistent with odd-parity pairing (such as p-wave). The magnetic field penetration depths in UPt3 and UBe13 are extremely long, greater than 10000 Å. We find no evidence of a magnetic transition in UBe13 below 10 K. © 1991.

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