Electric-field-controlled directional motion of ferroelectric domain walls in multiferroic BiFeO3 films. Kim, T. H., Baek, S. H., Yang, S. M., Jang, S. Y., Ortiz, D., Song, T. K., Chung, J. -., Eom, C. B., Noh, T. W., & Yoon, J. -. APPLIED PHYSICS LETTERS, DEC 28, 2009.
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We describe the directional ferroelectric domain wall motion in a multiferroic BiFeO3 thin film, which was grown epitaxially on a vicinal (001) SrTiO3 substrate. A structural analysis of the film shows that a strain gradient is developed in our film, which creates a symmetry breaking in a ferroelectric double-well potential. The asymmetric double-well potential can cause ferroelectric domain walls to move sideways with preferred directionality under a vertical electric field. Our results suggest the possibility of controlling the direction of domain growth with an electric field by imposing constraints on ferroelectric films, such as a strain gradient.
@article{ ISI:000273216900047,
Author = {Kim, T. H. and Baek, S. H. and Yang, S. M. and Jang, S. Y. and Ortiz, D.
   and Song, T. K. and Chung, J. -S. and Eom, C. B. and Noh, T. W. and
   Yoon, J. -G.},
Title = {{Electric-field-controlled directional motion of ferroelectric domain
   walls in multiferroic BiFeO3 films}},
Journal = {{APPLIED PHYSICS LETTERS}},
Year = {{2009}},
Volume = {{95}},
Number = {{26}},
Month = {{DEC 28}},
Abstract = {{We describe the directional ferroelectric domain wall motion in a
   multiferroic BiFeO3 thin film, which was grown epitaxially on a vicinal
   (001) SrTiO3 substrate. A structural analysis of the film shows that a
   strain gradient is developed in our film, which creates a symmetry
   breaking in a ferroelectric double-well potential. The asymmetric
   double-well potential can cause ferroelectric domain walls to move
   sideways with preferred directionality under a vertical electric field.
   Our results suggest the possibility of controlling the direction of
   domain growth with an electric field by imposing constraints on
   ferroelectric films, such as a strain gradient.}},
DOI = {{10.1063/1.3275736}},
Article-Number = {{262902}},
ISSN = {{0003-6951}},
ResearcherID-Numbers = {{Yang, Sang Mo/Q-2455-2015
   Baek, Seung-Hyub/B-9189-2013
   Noh, Tae Won/K-9405-2013
   Eom, Chang-Beom/I-5567-2014
   Kim, Tae Heon/C-5935-2015}},
ORCID-Numbers = {{Yang, Sang Mo/0000-0003-1809-2938
   Kim, Tae Heon/0000-0003-4835-0707}},
Unique-ID = {{ISI:000273216900047}},
}

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