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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.
Abstract

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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