Polarization of thin films of barium-strontium titanate under external electric field

Details Polarization of thin films of barium-strontium titanate under external electric field Polarization of thin films of barium-strontium titanate under external electric field

2010-08-06

arxiv.org/abs/1008.1197v1

Physics

Condensed Matter

Materials Science

6 pages, 4 figures

Scientific paper

The Landau theory of phase transitions of Ba0.8Sr0.2TiO3 thin film under external electric field applied in the planar geometry is developed. The interfacial van-der-Waals field Ez=1.1x10^8 V/m oriented normal to the film-substrate interface was introduced in to the model calculation to explain experimentally observed behavior of the polarization as a function of planar electric field. The Ez - misfit strain phase diagram of the film is constructed and discussed.

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