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Neutron scattering study of magnetic excitation in spinel structure spin-orbital coupling compound CuGa2O4

ORAL

Abstract

We report neutron scattering measurements on a single crystal CuGa2O4 sample. The spinel structure of CuGa2O4 can cause strong spin-orbit coupling in this compound. From DC susceptibility and elastic neutron measurements, we found no sign of long- or short-range magnetic order down to 0.1K. Measurements on low energy magnetic excitations show ring shape intensity distribution in momentum space from this sample at low temperature. With increasing temperature, the magnetic excitation intensity gradually goes away.

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Presenters

  • Zhijun Xu

    NIST and University of Maryland, National Institute of Standards and Technology, (NCNR, National Institute of Standards and Technology), NIST Center for Neutron Research

Authors

  • Zhijun Xu

    NIST and University of Maryland, National Institute of Standards and Technology, (NCNR, National Institute of Standards and Technology), NIST Center for Neutron Research

  • Guangyong Xu

    Center of Neutron Research, National Institute of Standards and Technology, Neutron-Condensed Matter Science Group, National Institute of Standards and Technology, National Institute of Standards and Technology, NIST, Center for Neutron Research, National Institute of Standards and Technology, NIST Center for Neutron Research, Oak Ridge National Laboratory

  • Aashish Sapkota

    Brookhaven national lab, Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Ames Laboratory, Ames, IA 50011, USA; Iowa State University, Ames, IA 50011, USA

  • yimin qiu

    NIST

  • Genda Gu

    Brookhaven National Laboratory, Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Brookhaven national lab, Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Brookhaven National Lab, Condensed Matter Physics and Material Science, Brookhaven National Laboratory, Upton, NY, United States, Brookhaven National Laboratories, Condensed Matter Physics and Material Science Division, Brookhaven National Laboratory

  • John Tranquada

    Brookhaven national lab, Brookhaven National Laboratory, Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory