Neutron Scattering Study of Spin-wave induced lattice modes in multiferroic BiFeO3

ORAL

Abstract

We have performed inelastic neutron scattering studies of the low-energy phonon and spin-wave modes in the multiferroic BiFeO3. We have observed an intensity enhancement near the lowest zone-center optic phonon increase upon cooling below TN and this enhancement is confined to a very narrow region in the energy-momentum space, where the spin wave spectral weight is expected to be small. An external magnetic field was found to affect the enhancement as well. Possible interactions between the lattice and spin dynamics will also be discussed.

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Presenters

  • Zhijun Xu

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

Authors

  • Zhijun Xu

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

  • Guangyong Xu

    NCNR, National Institute of Standards and Technology, NIST Center for Neutron Research, National Institute of Standards and Technology, NIST -Natl Inst of Stds & Tech, NIST Center for Neutron Research, NIST

  • John Schneeloch

    Brookhaven National Laboratory, Brookhaven Natl Lab, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Brookhaven National Lab

  • Jinsheng Wen

    National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing Univ, Department of Physics, Nanjing University, Nanjing University

  • Peter Gehring

    National Center for Neutron Research, NIST, NIST -Natl Inst of Stds & Tech, NIST Center for Neutron Research

  • Chris Stock

    University of Edinburgh, Univ of Edinburgh, University of Edingburgh, The University of Edinburgh, Physics , The University of Edinburgh

  • Barry Winn

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

  • Yang Zhao

    NIST center for Neutron Research, NIST Center for Neutron Research, University of Maryland and NIST Center for Neutron Research, National Institute of Standards and Technology

  • Masaaki Matsuda

    Oak Ridge National Lab, Neutron Scattering Division, Oak Ridge National Laboratory, Quantum Condensed Matter Division, Oak Ridge National Lab, Oak Ridge National Laboratory

  • Daniel Pajerowski

    Quantum Condensed Matter Division, Oak Ridge National Lab, NSD, Oak Ridge National Laboratory, Oak Ridge National Lab, Neutron Scattering Division, Oak Ridge National Laboratory

  • Genda Gu

    Brookhaven National Laboratory, Brookhaven National Labs, Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Condensed Matter Physics and Material Science Department, Brookhaven National Laboratory, Condensed Matter &materials Science, Brookhaven Natl Lab, Brookhaven Natl Lab, Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Brookhaven Natl. Lab, Brookhaven National Lab, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, brookhaven national laboratory

  • Toshimitsu Ito

    AIST

  • Robert Birgeneau

    Physics Department, University of California at Berkeley, Physics, University of California, Berkeley, UC Berkeley