A qualitative test for intrinsic size effect on ferroelectric phase transitions

Details A qualitative test for intrinsic size effect on ferroelectric phase transitions A qualitative test for intrinsic size effect on ferroelectric phase transitions

2010-08-06

arxiv.org/abs/1008.1228v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 3 figures, journal paper

Scientific paper

The size effect in ferroelectrics is treated as a competition between the geometrical symmetry of the ferroelectric sample and its crystalline symmetry. The manifestation of this competition is shown to be polarization rotation, which is driven by temperature and/or size variations, thus providing a qualitative indication of intrinsic finite size effect on ferroelectrics. The concept is demonstrated in a simple case of PbTiO3 nanowires having their axis parallel to [111]C direction, where the size effect is shown to include polarization rotation and an additional phase transition.

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