Small Angle Neutron Scattering Studies of the Vortex Lattice in the UPt3Mixed State: Direct Structural Evidence for the B→C Transition

U. Yaron, P. L. Gammel, G. S. Boebinger, G. Aeppli, P. Schiffer, E. Bucher, D. J. Bishop, C. Broholm, K. Mortensen

Research output: Contribution to journalArticlepeer-review

Abstract

Small angle neutron scattering studies of the flux line lattice (FLL) in UPt3 for fields H ⊥ c provide direct microscopic evidence for the 5 kOe B → C transition. We find a pronounced maximum in the longitudinal correlation length of the FLL at the transition and an abrupt change in the field dependence of the scattered intensity which can be interpreted as a 15% decrease in the coherence length and a 9% increase in the penetration depth, consistent with discontinuities in the critical fields. Finally, in the low field phase, the FLL distortion evolves roughly linearly with field, while in the high field phase it appears to be less field dependent.

Original languageEnglish (US)
Pages (from-to)3185-3188
Number of pages4
JournalPhysical review letters
Volume78
Issue number16
DOIs
StatePublished - Apr 21 1997

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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