Acoustic anomalies in UPt3 at high magnetic fields and low temperatures

J. R. Feller, J. B. Ketterson, D. G. Hinks, D. Dasgupta, Bimal K. Sarma

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Ultrasound velocity and attenuation measurements were performed on single crystals of the heavy fermion compound UPt3 in magnetic fields up to 33 T and at temperatures ranging from 2.4 K to below 0.1 K. With longitudinal sound propagated in the crystallographic basal plane, parallel to the applied field, the familiar elastic softening is observed at the metamagnetic transition field H∼20.2T. More complicated structure emerges at low temperatures, including quantum acoustic oscillations and a second velocity minimum at ∼21.6 T. A weak frequency dependence (dispersion) is observed in the velocity. The ultrasonic data are analyzed using the Landau-Khalatnikov formalism, from which temperature- and field-dependent relaxation times are deduced.

Original languageEnglish (US)
Pages (from-to)11538-11544
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number17
DOIs
StatePublished - Nov 1 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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