Abstract

A three-dimensional phenomenological model is proposed to describe both ferroelectricity and antiferroelectricity based on the Ginzburg-Landau-Devonshire theory. Its application to the multiferroic Sm-doped BiFeO3 system describes the temperature-, pressure-, and composition-induced ferroelectric to antiferroelectric phase transitions. The constructed temperature-composition and temperature-pressure phase diagrams show that compressive hydrostatic pressure and Sm doping have similar effects on the ferroelectric and antiferroelectric phase transitions. It is also indicated from the temperature-pressure phase diagram that the experimentally observed phase of BiFeO3 under the hydrostatic pressure from 3 GPa to 10 GPa is a PbZrO3-like antiferroelectric phase.

Department(s)

Mechanical and Aerospace Engineering

Keywords and Phrases

Antiferroelectricity; Ferroelectricity; Hydraulics; Hydrostatic pressure, Anti ferroelectrics; Antiferroelectric phase transition; Ferroelectricity and antiferroelectricity; Ginzburg-Landau; ITS applications; Phenomenological modeling; Pressure phase; Temperature composition, Phase diagrams

International Standard Serial Number (ISSN)

0003-6951; 1077-3118

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2015 American Institute of Physics (AIP), All rights reserved.

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