Magnetic properties of Cs2IrCl6 single crystals

ORAL

Abstract

Cs2IrCl6 is a member of cubic antifluorites A2IrCl6 (where A is an alkali metal or NH4) featuring isolated IrCl6 octahedra arranged on the FCC lattice. This class of material has gained renewed interest recently as a model FCC antiferromagnet with Jeff = ½ involving strong spin-orbit coupling and a combination of Heisenberg and Kitaev exchange interactions [1]. In contrast to K2IrCl6, very little work has been done on Cs2IrCl6. Here we will present the synthesis and characterization of Cs2IrCl6 single crystals. A paramagnetic-to-antiferromagnetic transition was revealed by specific heat and magnetic susceptibility measurements at Tn » 0.5 K. The spin structure was determined by neutron diffraction measurements. We will discuss the magnetic properties of Cs2IrCl6 in comparison to other cubic antifluorites in this family.

[1] Nazir Khan, et al, Physical Review B 99, 144425 (2019).

*Research conducted at ORNL's Spallation Neutron Source and High Flux Isotope Reactor was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U. S. Department of Energy.

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Presenters

  • Wei Tian

    • Oak Ridge National Laboratory

Authors

  • Wei Tian

    • Oak Ridge National Laboratory

  • Qiang Chen

    • University of Tennessee, Knoxville TN 37996
    • University of Tennessee

  • Adam A Aczel

    • Oak Ridge Nat'l Lab

  • Christopher R Wiebe

    • University of Winnipeg

  • Haidong Zhou

    • University of Tennessee

  • Jinguang Cheng

    • Chinese Academy of Sciences
    • Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
    • Institute of Physics Chinese Academy of Sciences