Quasi-One-Dimensional Magnons in an Intermetallic Marcasite

M. B. Stone, M. D. Lumsden, S. E. Nagler, D. J. Singh, J. He, B. C. Sales, and D. Mandrus
Phys. Rev. Lett. 108, 167202 – Published 20 April 2012

Abstract

We present inelastic neutron scattering measurements and first principles calculations examining the intermetallic marcasite CrSb2. The observed spin-wave dispersion implies that the magnetic interactions are strongly one-dimensional with antiferromagnetic chains parallel to the crystalline c axis. Such low-dimensional excitations are unexpected in a semiconducting intermetallic system. Moreover, we observe a clear anisotropic thermal conductivity indicating that the magnetic anisotropy enhances thermoelectric properties along particular crystallographic directions.

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  • Received 11 November 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.167202

© 2012 American Physical Society

Authors & Affiliations

M. B. Stone1, M. D. Lumsden1, S. E. Nagler1, D. J. Singh2, J. He3, B. C. Sales2, and D. Mandrus2,4

  • 1Neutron Sciences Directorate, Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 2Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 3Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, USA
  • 4Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA

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Issue

Vol. 108, Iss. 16 — 20 April 2012

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