Resonant scattering of phonons in the quasi-one-dimensional spin-chain compounds AB2 O6 (A = Ni, Co; B = Sb, Ta)

N. Prasai, A. B. Christian, J. J. Neumeier, J. L. Cohn

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1 Scopus citations

Abstract

We report measurements of thermal conductivity (κ) on single crystals of the quasi-one-dimensional antiferromagnetic spin-chain compounds AB2O6 (A = Ni, Co; B = Sb, Ta) in the temperature range 5≤T≤300 K. We find that κ for all crystallographic directions is substantially suppressed in the Ta compounds in comparison to those of the Sb compounds despite their very similar magnetic and crystallographic structures. The data are well described by resonant scattering of phonons from two-level systems, with energy splittings of ∼100-150 K and scattering strength an order of magnitude greater in the Ta compounds. We distinguish the effects of phonon-spin interactions from those related to changes in the low-energy phonon spectra caused by the different B-site ions.

Original languageEnglish (US)
Article number134449
JournalPhysical Review B
Volume98
Issue number13
DOIs
StatePublished - Oct 30 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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