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.

*This material is based upon work supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Material Sciences and Engineering, under grants No. DEFG02-12ER46888 (Univ.~Miami) and No. DEFG02-08ER46544 (Johns Hopkins Univ.)

–

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