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Muon spin relaxation in the heavy fermion system UPt3

  • Author(s): Luke, GM
  • Le, LP
  • Sternlieb, BJ
  • Wu, WD
  • Uemura, YJ
  • Dalichaouch, Y
  • Lee, BW
  • Maple, MB
  • Seaman, CL
  • Armstrong, PE
  • Ellis, RW
  • Fisk, Z
  • et al.

Published Web Location

https://doi.org/10.1063/1.350161Creative Commons Attribution 4.0 International Public License
Abstract

We report muon spin rotation/relaxation (μSR) measurements of the heavy fermion superconductor UPt3in external fields Hext∥ĉ. We find that the muon Knight shift is unchanged in the superconducting state, consistent with odd-parity pairing (such as p wave). The transverse field relaxation is observed to be strongly field dependent, decreasing with increasing field. Below Tcthe increase is barely detectable in an applied field of 4 kG∥ĉ. On the basis of the high field measurements, we estimate the low temperature penetration depth to be λ(T→0)≥ (R18)11 000 Å.

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