Unusual vortex structure in ultrathin Pb(Zr₀.₅Ti₀.₅)O₃ films
Wu, Zhongqing · Huang, Ningdong · Liu, Zhirong · Wu, Jian · Duan, Wenhui · Gu, Bing-Lin
Original · EN
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 and they are responsible for the 180∘ 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.
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