Low-temperature thermal conductivity of the frustrated S=3/2 Heisenberg helimagnet ZnCr<sub>2</sub>Se<sub>4</sub>

ORAL

Abstract

We report thermal conductivity measurements on single crystals of ZnCr2Se4 in the temperature range 5 K ≤ T ≤ 300 K. This compound undergoesa,b a helical antiferromagnetic transition accompanied by a cubic-tetragonal structural modification at TN ≈ 21 K. Its magnetic sublattice comprises spin-3/2 Cr3+ ions in a geometrically-frustrated pyrochlore structure. We will discuss thermal conductivity measurements along various crystallographic directions, the overall magnitude of which are higher than that of polycrystalsc by a factor of 5.

a R. Plumier, J. Phys. 27, 213 (1966).
b V. Felea et al., Phys. Rev. B 86, 104420 (2012).
c X. Chen and Z. Yang, AIP Advances 6, 056212 (2016).

*This material is based on work supported by the U.S. DOE, Off. of BES, Div. of Mater. Sci. and Eng., under grant No. DE-FG02-12ER46888 (Univ. Miami) and the German Research Foundation via SFB 1143 (Project C03) and individual grant No. IN 209/4-1 (TU Dresden).

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Presenters

  • Dharmendra Shukla

    • Physics, Univ of Miami

Authors

  • Dharmendra Shukla

    • Physics, Univ of Miami

  • Joshua Cohn

    • Physics, Univ of Miami

  • Dmytro Inosov

    • TU Dresden
    • Institut für Festkörper- und Materialphysik, Technische Universität Dresden

  • Vladimir Tsurkan

    • Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg

  • Alois Loidl

    • Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg
    • Experimental Physics V, University of Augsburg