Relaxor ferroelectrics have fascinating physical properties exhibitting a stronger piezoelectric effect, a high permittivity value over a broad temperature range, and a strong frequency disperion in dielectric response. Currently, the properties are explained by a model with polar nanoregions in a non-polar matrix. However, fundamental scientific understandings of the polar nanoregions have been poorly clear. In order to elucidate mechanism of the propertie, we are investigating analysis of local structure and dynamics using molecular dynamics simulations. Recently we found local dynamics induced by interaction through sharing oxygen atoms. This transition is analogous to water which exhibits unique dielectric response similar to relaxors.
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