Neutron scattering investigation on a giant magnetoelectric effect compound Ba<sub>1-x</sub>Sr<sub>x</sub>Mg<sub>2</sub>Fe<sub>12</sub>O<sub>22 </sub>

ORAL

Abstract


Y-type hexaferrite Ba2Mg2Fe12O22 is a promising multiferroics that is sensitive to small magnetic field. When doped with Sr, the material keeps its sensitivity to field while the ME coefficients are greatly enhanced with Sr level increasing. Our recent work has reported new records of ME coefficients in single phase materials at Ba0.4Sr1.6Mg2Fe12O22. With neutron scattering study, we found that there is a link between the ground state spin cone symmetry and the magnitude of the polarization which could be modulated sufficiently with Sr doping level. Temperature dependent neutron diffraction investigation shows pinning effect emerging at heavy Sr doped sample that has an alternating longitudinal conical ground state. The study of size effect indicates that the simultaneously occurred effects could correspond to relatively independent mechanisms.

*The neutron scattering work was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy.

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Presenters

  • Yan Wu

    • Neutron Sciences Directorate, Oak Ridge National Laboratory
    • Oak Ridge National Lab
    • Physics, Louisiana State Univ

Authors

  • Yan Wu

    • Neutron Sciences Directorate, Oak Ridge National Laboratory
    • Oak Ridge National Lab
    • Physics, Louisiana State Univ

  • Kun Zhai

    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

  • Shipeng Shen

    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

  • Wei Tian

    • Oak Ridge National Laboratory
    • Neutron Sciences Directorate, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Lab

  • Bryan Chakoumakos

    • Neutron Sciences Directorate, Oak Ridge National Laboratory

  • Yi-Sheng Chai

    • Institute of Physics
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

  • Liqin Yan

    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

  • Dashan Shang

    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

  • Fangwei Wang

    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

  • Huibo Cao

    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory
    • Quantum Condensed Matter Division, Oak Ridge National Laboratory
    • Neutron Sciences Directorate, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Lab
    • Oak Ridge National Lab
    • Oak Ridge Natl Lab
    • Quantum Condensed Matter Division , Oak Ridge National Laboratory

  • Young Sun

    • Institute of Physics
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences