Work

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

Year: 2008

Type: article

Abstract: The temperature dependence of the dielectric permittivity of perovskite Ba(ZrxTi1−x)O3 solid solutions, PbMg1/3Nb2/3O3 relaxor, and BaTiO3 ferroelectric 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.

Source: Applied Physics Letters

DOI: 10.1063/1.2987733

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

Institutions: Hong Kong Polytechnic University, Northwestern Polytechnical University, State Key Laboratory of Solidification Processing

Language: English

Topic: Ferroelectric and Piezoelectric Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: Hong Kong Polytechnic University, Ministry of Education, India

OpenAlex ID: W1990226002