Abstract
By taking into account surface transition layers (STL), the dielectric properties of ferroelectric thin films described by the transverse Ising model are discussed in the framework of the mean-field approximation. Functions of the intra-layer and inter-layer couplings are introduced to characterize STL, which makes the model more realistic compared to the previous treatment of surface layers using uniform surface exchange interactions and a transverse field. The effects of physical parameters on the dielectric properties are quantified. The results obtained indicate that STL has a very strong influence on the dielectric properties of ferroelectric thin films. Some of our theoretical results are in accordance with the available experimental data.
Original language | English (US) |
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Pages (from-to) | 1963-1971 |
Number of pages | 9 |
Journal | Physica A: Statistical Mechanics and its Applications |
Volume | 387 |
Issue number | 8-9 |
DOIs | |
State | Published - Mar 15 2008 |
All Science Journal Classification (ASJC) codes
- Statistics and Probability
- Condensed Matter Physics