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

doi:10.1103/PhysRevB.98.134449

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

Physics

Research output: Contribution to journal › Article › peer-review

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 language	English (US)
Article number	134449
Journal	Physical Review B
Volume	98
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.98.134449
State	Published - Oct 30 2018

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.98.134449

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

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.",

author = "N. Prasai and Christian, {A. B.} and Neumeier, {J. J.} and Cohn, {J. L.}",

note = "Funding Information: This material is based upon work supported by the U.S. Department of Energy (DOE), Office of Science Basic Energy Sciences (BES) under Awards No. DE-SC0008607 (Univ. Miami) and No. DE-SC0016156 (Montana St. Univ.). Publisher Copyright: {\textcopyright} 2018 American Physical Society. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.",

year = "2018",

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AU - Prasai, N.

AU - Christian, A. B.

AU - Neumeier, J. J.

AU - Cohn, J. L.

N1 - Funding Information: This material is based upon work supported by the U.S. Department of Energy (DOE), Office of Science Basic Energy Sciences (BES) under Awards No. DE-SC0008607 (Univ. Miami) and No. DE-SC0016156 (Montana St. Univ.). Publisher Copyright: © 2018 American Physical Society. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

PY - 2018/10/30

Y1 - 2018/10/30

N2 - 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.

AB - 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.

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