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Abstract
The nonlinear dielectric response of epitaxial thin films of relaxor ferroelectric PbMg1/3Nb2/3O3 was experimentally studied using digital Fourier analysis. Change from glass-like to ferroelectric behavior was detected in a broad temperature range, at relatively low ac and/or dc electric fields, and at a time scale of seconds. The presence of interfaces and peculiar microstructure of thin films are suggested to determine such a specific behavior.
Acknowledgements
The authors acknowledge the financial support of the Academy of Finland (Project No. 50941) and EU Centre of Excellence CAMART, Institute of Solid State Physics, University of Latvia.