Low-temperature magneto-thermal conductivity of the helimagnet Cu$_2$OSeO$_3$

ORAL

Abstract

We report measurements of thermal conductivity ($\kappa$) in the range $0.6\ {\rm K}\leq T\leq 200$~K for single crystals of the helimagnetic insulator Cu$_2$OSeO$_3$. A maximum in $\kappa$ near $T=8$~K with $\kappa_{max}\sim 300$~W/mK implies a very high lattice quality for an oxide. The magneto-thermal conductivity at $T\leq 10$~K and influence of spin-reorientation transitions associated with low-$T$ magnetic phases will be discussed for different orientations of the magnetic field relative to the crystallographic and heat flow directions.

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Authors

  • Narayan Prasai

    University of Miami

  • Sunxiang Huang

    University of Miami

  • Joshua L. Cohn

    University of Miami

  • Benjamin Trump

    Institute for Quantum Matter and Jonhs Hopkins University, Johns Hopkins University, Johns Hopkins Univ

  • Guy G. Marcus

    Institute for Quantum Matter and Jonhs Hopkins University, Johns Hopkins University

  • Tyrel M. McQueen

    Johns Hopkins Univ, Institute for Quantum Matter and Jonhs Hopkins University, Institute for Quantum Matter and Johns Hopkins University, Johns Hopkins University, Institute for Quantum Matter, Johns Hopkins University

  • Chia Ling Chen

    Johns Hopkins University