Magneto-Raman Spectroscopy on Vanadium-derived Lacunar Spinel GaV4S8

POSTER

Abstract

GaV4S8(GaVS) is a magnetic semiconductor with a Neel-type skyrmion phase lattice displaying multiferroic properties [1]. Magnetic susceptibility measurements indicate the presence of a structural transition at 42 K followed by a ferromagnetic order at 12 K [2]. Recent temperature-dependent infrared and Raman spectroscopic measurements identified the various phonon modes and the presence of Jahn-Teller distortions in this compound [3]. To obtain more detailed information on the various exchange interactions in this compound, we performed magneto-Raman measurements at magnetic fields up to 14 T at temperature down to 5 K. In this poster I will present the main results of our magneto-Raman investigations and its implications.
References:[1] I. Kézsmárki et al. Nat. Matter. 14, 1116 (2015). [2] C.S. Yadav et al. Phys. Rev. B: Condens. Matter. 403, 1474 (2008). [3] J. Hlinka et al. Phys. Rev. B. 94, 060104 (2016)

Presenters

  • Gary Knight

    Physics, Florida A&M University

Authors

  • Gary Knight

    Physics, Florida A&M University

  • Zhengguang Lu

    National High Magnetic Field Laboratory, Florida State Universtiy, Physics, Florida State University, Natl High Magnetic Field Lab, NHMFL, FSU

  • Ganesh Pokharel

    Materials Science and Engineering, University of Tennessee, University of Tennessee, Knoxville, Univ of Tennessee, Knoxville

  • Hasitha Suria Arachchige

    Materials Science and Engineering, University of Tennessee, Univ of Tennessee, Knoxville

  • Andrew Christianson

    Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory

  • David Mandrus

    Department of Materials Science and Engineering, The University of Tennessee, Oak Ridge National Lab, Oak Ridge National Laboratory, Department of Materials Science and Engineering, University of Tennessee, University of Tennessee, Materials Science and Technology, Oak Ridge National Laboratory, Materials Science and Engineering, The University of Tennessee, Materials Science and Engineering, University of Tennessee, Material Science and Technology Division, Oak Ridge National Laboratory, Oakridge National Laboratory, University of Tennessee, Knoxville, Univ of Tennessee, Knoxville

  • Dmitry Smirnov

    1800 East Paul Dirac Drive, Natl High Magnetic Field Lab, Natl High Magnetic Field Lab, National High Magnetic Field Laboratory, NHMFL, Condensed Matter Science, National High Magnetic Field Laboratory, NHMFL, FSU

  • Komalavalli Thirunavukkuarasu

    Florida A&M Univ, Physics, Florida A&M University, Florida A&M University, Florida A&M Univ.