Heat transport in a nuclear antiferromagnet

D. D. Osheroff, Y. P. Feng, P. Schiffer

Research output: Contribution to journalArticle

Abstract

We report the first measurements of heat transport due to thermal magnons in mono-domain single crystals of U2D2 3He. Between about 0.95Tc and 0.65Tc we find clear evidence for umklapp scattering with an activation energy of 5.8±0.3 mK, with a much weaker temperature dependence at lower T. Our limiting mean free paths varied from 0.3 μm to 3 μm depending upon crystal orientation. We have also measured the thermal resistance between the U2D2 solid and the bulk B superfluid phase between 0.35 mK and 0.6 mK, where we find an activated conductivity with an energy of 4.5±0.3 mK. The heat path involves both the solid-liquid boundary resistance and the resistance of superfluid in a 1 mm diameter tube.

Original languageEnglish (US)
Pages (from-to)204-208
Number of pages5
JournalPhysica B: Physics of Condensed Matter
Volume169
Issue number1-4
DOIs
StatePublished - Feb 2 1991

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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