Theoretical study on the influence of surface imperfections on the properties of ferroelectric thin films in first-order ferroelectric systems

Shan Lin; Tianquan Lü; Wenwu Cao

doi:10.1002/pssb.200642100

Theoretical study on the influence of surface imperfections on the properties of ferroelectric thin films in first-order ferroelectric systems

Shan Lin, Tianquan Lü, Wenwu Cao

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

A generalized Ginzburg-Landau-Devonshire (GLD) theory is used to study the properties of ferroelectric thin films sandwiched between two metal electrodes with a first-order phase transition. By taking into account the effect of the imperfect surface layer and a natural boundary condition, the temperature and film-thickness dependence of the spontaneous polarization and the dielectric susceptibility are calculated. The depolarization field makes the polarization distribution more uniform. In addition, an asymmetric hysteresis loop can be obtained due to the existence of asymmetrical imperfect surface layers.

Original language	English (US)
Pages (from-to)	2952-2961
Number of pages	10
Journal	Physica Status Solidi (B) Basic Research
Volume	243
Issue number	12
DOIs	https://doi.org/10.1002/pssb.200642100
State	Published - Oct 2006

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1002/pssb.200642100

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abstract = "A generalized Ginzburg-Landau-Devonshire (GLD) theory is used to study the properties of ferroelectric thin films sandwiched between two metal electrodes with a first-order phase transition. By taking into account the effect of the imperfect surface layer and a natural boundary condition, the temperature and film-thickness dependence of the spontaneous polarization and the dielectric susceptibility are calculated. The depolarization field makes the polarization distribution more uniform. In addition, an asymmetric hysteresis loop can be obtained due to the existence of asymmetrical imperfect surface layers.",

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AU - Lü, Tianquan

AU - Cao, Wenwu

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AB - A generalized Ginzburg-Landau-Devonshire (GLD) theory is used to study the properties of ferroelectric thin films sandwiched between two metal electrodes with a first-order phase transition. By taking into account the effect of the imperfect surface layer and a natural boundary condition, the temperature and film-thickness dependence of the spontaneous polarization and the dielectric susceptibility are calculated. The depolarization field makes the polarization distribution more uniform. In addition, an asymmetric hysteresis loop can be obtained due to the existence of asymmetrical imperfect surface layers.

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Theoretical study on the influence of surface imperfections on the properties of ferroelectric thin films in first-order ferroelectric systems

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