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NMR Investigation of Ferroquadrupolar Order in TmVO<sub>4</sub>

ORAL

Abstract

TmVO4 undergoes a tetragonal to orthorhombic structural phase transition below 2.2K due to a cooperative Jahn-Teller distortion. The Tm ions experience a crystal-field effect with a non-Kramer’s ground state doublet, and undergo ferroquadrupolar order that breaks the C4 symmetry of the lattice. This material is therefore a model system to investigate Ising nematic ordering without competing phases. While previous 51V NMR has been hampered by significant line broadening due to demagnetization fields at low temperature, here we present improved results where we are able to separate magnetic and quadrupolar relaxation channels in a single crystal of ellipsoidal shape for which this broadening is absent. These are the first NMR measurements in which an ellipsoidal sample is used that has been carefully cut by a focused ion beam (FIB).

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Presenters

  • Igor Vinograd

    University of California, Davis, Physics, University of California, Davis, Laboratoire National des Champs Magnetiques Intenses

Authors

  • Igor Vinograd

    University of California, Davis, Physics, University of California, Davis, Laboratoire National des Champs Magnetiques Intenses

  • Zhipan Wang

    University of California, Davis

  • Kent R Shirer

    Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Max Planck Institute for Chemical Physics of Solids

  • Andrew Mackenzie

    Max Planck Institute for Chemical Physics of Solids, Dresden, Germany, Max Planck Institute for Chemical Physics of Solids, Max Planck Institute for the Chemical Physics of Solids

  • Daphne Garcia

    University of California, Davis

  • Mladen Horvatić

    LNCMI Grenoble, LNCMI

  • Pierre Massat

    Stanford University

  • Ian R Fisher

    Geballe Laboratory for Advanced Materials, Stanford University, Stanford Univ, Stanford University, Department of Applied Physics, Stanford University