Thermal conductivity of the one-dimensional S=1/2 antiferromagnet Yb 4(As1-xPx)3 (x = 0 and 0.3)

A. Sanchez, S. Paschen, B. Wand, Hayuyoshi Aoki, A. Ochiai, F. Steglich

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Abstract

The thermal conductivity κ of Yb4(As1-xP x)3 (x = 0 and 0.3) was measured in the temperature range between 0.1 and 7 K in applied magnetic fields up to 8 T. The fact that κ(7) follows, between 0.4 and 3 K, the relation aT + bT2 confirms our earlier interpretation of the dominating role of magnons both as heat carriers and as scatterers for the phonons. Above 1 K, κ decreases with increasing magnetic field, the opening of a gap in the magnon-excitation spectrum being a possible explanation of this behavior.

Original languageEnglish
Pages (from-to)e703-e705
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2004 May 1

Keywords

  • Antiferromagnet
  • Magnon
  • Thermal conductivity
  • YbAs

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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