Microstructures of Relaxor Ferroelectrics

As suggested, the defining characteristics of relaxor ferroelectrics are due to a complex microsttucture. In normal materials the ferroelectric domain size is large, often identical to the grain size in a ceramic sample, and each domain is uniform. In relaxor ferroelectrics the B-sites are occupied by two cations, B and B. These are not 

The actual nature of the polar nanoregions remains an important question. At high temperatures, well above T, the cations are mobile and PNRs, in this case, are 

At the Bums temperature, T, nucleation and growth of stable polar nanoregions occurs. This state is called the ER state, which implies that the PNRs, although still forming and reforming, form a quasi-equilibrium situation, so that over the course 

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