Development of an Atomic Level Model for BiFeO3 from First-Principles
We develop a first-principles atomistic shell model for BiFeO3 to study its ferroelectric and structural properties at finite temperature. The parameters of the potential are adjusted to reproduce first-principles results in different relevant configurations. Molecular dynamics simulations show that...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/4417 |
| Acceso en línea: | http://hdl.handle.net/11336/4417 |
| Access Level: | acceso abierto |
| Palabra clave: | Multiferroics Atomistic Simulations Phase Transitions Bifeo3 https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | We develop a first-principles atomistic shell model for BiFeO3 to study its ferroelectric and structural properties at finite temperature. The parameters of the potential are adjusted to reproduce first-principles results in different relevant configurations. Molecular dynamics simulations show that the resulting model is able to describe the ground-state ferroelectric R3c structure which remains stable as the temperature increases. At about 1100 K, system displays a first-order phase transition to the paraelectric Pbnm phase. Our results indicate that the developed model captures the delicate structural behavior shown by the ab-initio calculations and is able to reproduce the temperature behavior observed in experiments. |
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