Journal
APPLIED PHYSICS LETTERS
Volume 106, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4905444
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Funding
- NSF MRSEC [DMR-0820404, DMR-1410714, DMR-1210588]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [FG02-07ER46417]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1210588] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1410714] Funding Source: National Science Foundation
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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. (C) 2015 AIP Publishing LLC.
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