Polaron relaxation in ferroelectric thin films

Details Polaron relaxation in ferroelectric thin films Polaron relaxation in ferroelectric thin films

2012-01-10

arxiv.org/abs/1201.2061v1

Physics

Condensed Matter

Materials Science

Scientific paper

We report a dielectric relaxation in ferroelectric thin films of the ABO3 family. We have compared films of different compositions with several growth modes: sputtering (with and without magnetron) and sol-gel. The relaxation was observed at cryogenic temperature (T<100K) for frequencies from 100Hz up to 10MHz. This relaxation activation energy is always lower than 200meV. It is very similar to the polaron relaxation that we reported in the parent bulk perovskites. Being independent of the materials size, morphology and texture, this relaxation can be a useful probe of defects in actual integrated capacitors with no need for specific shaping

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