Physics – Condensed Matter – Materials Science
Scientific paper
2004-07-27
Physics
Condensed Matter
Materials Science
5 pages, 3 figures
Scientific paper
Using a first-principles-based approach, we determine the ferroelectric pattern in PbZr$_{0.5}$Ti$_{0.5}$O$_3$ ultrathin film. It is found that vortex stripes are formed in the system and they are responsible for the 180$^\circ$ domains observed. 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.
Duan Wenhui
Gu Bing-Lin
Huang Ningdong
Liu Zhirong
Wu Jian
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