Comment on ``Thermal properties of magnons in yttrium iron garnet at elevated magnetic fields''

Comment on “Thermal properties of magnons in yttrium iron garnet at elevated magnetic fields”

Stephen R. Boona and Joseph P. Heremans

Phys. Rev. B 91, 226401 – Published 5 June 2015

Abstract

Rezende and López Ortiz [Phys. Rev. B 91, 104416 (2015)] published a calculation for the magnon specific heat and thermal conductivity of yttrium iron garnet in the presence of large magnetic fields. The results reproduced our previous temperature-dependent measurements of both quantities in fields up to 70 kOe [Phys. Rev. B 90, 064421 (2014)]. Here, we point out that the experimentally observed magnetic-field dependence of thermal conductivity shows a faster saturation than their model explains. Furthermore, their results do not affect the main conclusion of our paper regarding the magnon thermal mean-free path.

Received 27 March 2015
Revised 12 May 2015

DOI:https://doi.org/10.1103/PhysRevB.91.226401

Authors & Affiliations

Stephen R. Boona¹ and Joseph P. Heremans^1,2,3

¹Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio 43210, USA
²Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA
³Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43219, USA

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Original Article

Thermal properties of magnons in yttrium iron garnet at elevated magnetic fields

S. M. Rezende and J. C. López Ortiz

Phys. Rev. B 91, 104416 (2015)

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Issue

Vol. 91, Iss. 22 — 1 June 2015

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