Thermal Conductivity due to Magnon Heat Transport in Ca$_{2+x}$Y$_{2-x}$Cu$_{5}$O$_{10}$

ORAL

Abstract

In the spin-chain structure Ca$_{2+x}$Y$_{2-x}$Cu$_{5}$O$_{10}$, the thermal conductivity in some samples is observed to exhibit two peaks attributed to the thermal transport contributions by phonons and magnons. We have built a thermal conductivity probe, with a 2D rotation stage, to study the magnon contribution to the thermal conductivity of ceramic samples over the range 4--300 K. We plan to measure changes in the magnon contribution by varying the orientation of the lattice with respect to the magnetic field. We have prepared a set of samples with small deviations in oxygen stoichiometry to examine the effects of the defects on magnon thermal transport.

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Authors

  • Raheem Bello

    Department of Physics, Department of Astronomy University of Texas

  • Isaac V. Manzanera Esteve

    Department of Physics, University of Texas, The University of Texas at Austin, Department of Physics, University of Texas. Physics Department

  • John T. Markert

    Department of Physics, University of Texas, The University of Texas at Austin, Department of Physics, University of Texas. Physics Department, Department of Physics, The University of Texas at Austin