Domain Wall Magnetism in Multiferroic BiFeO3

POSTER

Abstract

Through a combination of theoretical calculations and experimental studies, a holistic picture of the connection between processing, structure, and properties brings to light the role of magnetism at ferroelectric domain walls in determining the magnetic properties in BiFeO$_{3}$. By controlling domain structures through epitaxial growth constraints and probing these domain walls with exchange bias studies, x-ray magnetic dichroism based spectromicroscopy, and high resolution transmission electron microscopy we demonstrate that the formation of certain types of ferroelectric domain walls (i.e., 109$^{\circ}$ walls) can lead to enhanced magnetic moments in BiFeO$_{3}$. This work is supported by the Department of Energy.

Authors

  • Qing He

    • Department of Physics, UC Berkeley

  • S.-Y. Yang

    • Department of Physics, UC Berkeley

  • C.-H. Yang

    • Department of Physics, UC Berkeley

  • P. Yu

    • Materials Sciences Division, Lawrence Berkeley National Laboratory
    • University of California Berkeley
    • Department of Physics, UC Berkeley

  • J. Wu

    • Department of Physics, UC Berkeley

  • Z. Q. Qiu

    • UC-Berkeley
    • Department of Physics, UC Berkeley

  • R. Ramesh

    • University of California, Berkeley
    • Materials Sciences Division, Lawrence Berkeley National Laboratory
    • University of California Berkeley
    • Department of Physics, UC Berkeley

  • M. Daraktchiev

    • Department of Earth Science, University of Cambridge

  • G. Catalan

    • Department of Earth Science, University of Cambridge

  • J.F. Scott

    • Department of Earth Science, University of Cambridge
    • University of Cambridge

  • Elke Arenholz

    • Advanced Light Source, LBNL
    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Andreas Scholl

    • Advanced Light Source, LBNL
    • Advanced Light Source, Lawrence Berkeley Labs

  • A. Fraile-Rodriguez

    • Swiss Light Source, PSI

  • D. Lee

    • Physics Department, Stanford University

  • S. X. Wang

    • Physics Department, Stanford University

  • L. Martin

    • Department of Materials Science and Engineering, UIUC

  • Y.-H. Chu

    • Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
    • Department of Materials Science and Engineering, National Chiao Tung University