Lorentz-type relationship of the temperature dependent dielectric permittivity in ferroelectrics with diffuse phase transition

Shanming Ke; Huiqing Fan; Haitao Huang; H. L.W. Chan

doi:10.1063/1.2987733

Lorentz-type relationship of the temperature dependent dielectric permittivity in ferroelectrics with diffuse phase transition

Shanming Ke, Huiqing Fan, Haitao Huang, H. L.W. Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

97 Citations (Scopus)

Abstract

The temperature dependence of the dielectric permittivity of perovskite Ba (ZrxTi1-x)O3solid solutions, PbMg1/3Nb2/3O3relaxor, and BaTiO3ferroelectric ceramics was measured. It is found that a Lorentz-type law can be used to describe the dielectric permittivity of either the normal ferroelectrics with or without diffuse phase transitions (DPT) or the typical ferroelectric relaxors. The ferroelectric DPT can be well described by just one fitting process using the Lorentz-type law, while the relaxor ferroelectric transition needs two independent fitting processes. The Lorentz-type law fails at the low temperature side of the dielectric maximum of a first-order ferroelectric phase transition. Above the transition temperature, the dielectric curves of all the studied materials can be well described by a Lorentz-type law.

Original language	English
Article number	112906
Journal	Applied Physics Letters
Volume	93
Issue number	11
DOIs	https://doi.org/10.1063/1.2987733
Publication status	Published - 29 Sept 2008

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2987733

http://hdl.handle.net/10397/549

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abstract = "The temperature dependence of the dielectric permittivity of perovskite Ba (ZrxTi1-x)O3solid solutions, PbMg1/3Nb2/3O3relaxor, and BaTiO3ferroelectric ceramics was measured. It is found that a Lorentz-type law can be used to describe the dielectric permittivity of either the normal ferroelectrics with or without diffuse phase transitions (DPT) or the typical ferroelectric relaxors. The ferroelectric DPT can be well described by just one fitting process using the Lorentz-type law, while the relaxor ferroelectric transition needs two independent fitting processes. The Lorentz-type law fails at the low temperature side of the dielectric maximum of a first-order ferroelectric phase transition. Above the transition temperature, the dielectric curves of all the studied materials can be well described by a Lorentz-type law.",

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AB - The temperature dependence of the dielectric permittivity of perovskite Ba (ZrxTi1-x)O3solid solutions, PbMg1/3Nb2/3O3relaxor, and BaTiO3ferroelectric ceramics was measured. It is found that a Lorentz-type law can be used to describe the dielectric permittivity of either the normal ferroelectrics with or without diffuse phase transitions (DPT) or the typical ferroelectric relaxors. The ferroelectric DPT can be well described by just one fitting process using the Lorentz-type law, while the relaxor ferroelectric transition needs two independent fitting processes. The Lorentz-type law fails at the low temperature side of the dielectric maximum of a first-order ferroelectric phase transition. Above the transition temperature, the dielectric curves of all the studied materials can be well described by a Lorentz-type law.

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Lorentz-type relationship of the temperature dependent dielectric permittivity in ferroelectrics with diffuse phase transition

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