Smearing of phase transition due to surface effect in ferroelectric nanostructures

Details Smearing of phase transition due to surface effect in ferroelectric nanostructures Smearing of phase transition due to surface effect in ferroelectric nanostructures

2004-10-11

arxiv.org/abs/cond-mat/0410263v2

Physics

Condensed Matter

Materials Science

5 pages, 1 figure. This contains much expanded first part of cond-mat/0402100 with detailed derivation of nonlinear effective

Scientific paper

The boundary conditions, customarily used in the Landau-type approach to ferroelectric thin films and nanostructures, have to be modified to take into account that a surface of a ferroelectric (FE) is a defect of a ``field'' type. The surface (interface) field is coupled to a normal component of polarization and, as a result, the second order phase transitions are generally suppressed and anomalies in response are washed out, as observed experimentally.

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