Piezoelectric-response of charged 180$^{\circ}$ ferroelectric domain walls

ORAL

Abstract

We report ambient piezoresponse force microscopy (PFM) studies of the multiferroic hexagonal manganite HoMnO$_3$ performed on the cleaved (110) surface of a single crystal specimen. By changing the sample orientation with respect to the cantilever, we observed an unexpected out-of-plane PFM signal at domain walls which depends on domain wall orientation, in addition to the expected in-plane PFM signal in domains. Further studies confirmed that the domain wall PFM signal results from an out-of-plane displacement, which can be explained by a simple model of local elastic response with conservation of unit cell volume at head-on domain walls.

*NSF-DMR-0844807 and NSF-DMR-1104484

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Authors

  • Edward Lochocki

    • Department of Physics and Astronomy and Rutgers Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08854, USA

  • Soonyong Park

    • Department of Physics, Chung-Ang University, Seoul 156, Republic of Korea

  • Nara Lee

    • Department of Physics and Astronomy and Rutgers Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers University
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University
    • Rutgers Center for Emergent Materials and Dept of Phys and Astronomy, Rutgers U., NJ, USA
    • Department of Physics and Astronomy and Rutgers Center for emergent materials, Rutgers University, Piscataway, NJ 08854 USA

  • S-W. Cheong

    • Rutgers Center for Emergent Materials
    • Rutgers University
    • Department of Physics and Astronomy and Rutgers Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University
    • Rutgers Center for Emergent Materials and Dept of Phys and Astronomy, Rutgers U., NJ, USA
    • Department of Physics and Astronomy and Rutgers Center for emergent materials, Rutgers University, Piscataway, NJ 08854 USA

  • Weida Wu

    • Department of Physics and Astronomy and Rutgers Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08854, USA
    • Department of Physics and Astronomy and Rutgers Center for emergent materials, Rutgers University, Piscataway, NJ 08854 USA