Journal
JOURNAL OF APPLIED PHYSICS
Volume 101, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2404534
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Using a first-principles-based approach, we determine the ferroelectric pattern in PbZr0.5Ti0.5O3 ultrathin film. It is found that vortex stripes are formed in the system. The relation between the vortex stripes and the 180 degrees domains is discussed. When a local external field is exerted, the vortex stripe transforms into the vortex loop structure, which leads to the formation of a smaller domain with the polarization antiparallel to the field in the center of the field region. This may provide a convenient way to manipulate nanodomains in thin films. (c) 2007 American Institute of Physics.
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