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
