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The role of the ferroelectric polarization state and crystal structure in determining the room-temperature thermal conductivity of epitaxial BiFeO₃ thin films is investigated. The ferroelectric domain configuration is varied by changing the oxygen partial pressure during growth, as well as by polarizing the samples by the application of an in situ electric field during the thermal conductivity measurement. However, little or no dependence of thermal conductivity on the ferroelectric domain structure is observed. In contrast, the thermal conductivity significantly depends on the morphotropic phase structure, being about 2/3 as large in tetragonal-like compared to rhombohedral-like BiFeO₃ film. The substantial structural dependence of thermal conductivity found here may provide a route to reversible manipulation of thermal properties.

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Ning, Shuai -  Huberman, Samuel C. -  Zhang, Chen -  Zhang, Zhengjun -  Chen, Gang -  Ross, Caroline A. - 

Id.: 71184091

Idioma: inglés  - 

Versión: 1.0

Estado: Final

Tipo de recurso: Article  -  http://purl.org/eprint/type/JournalArticle  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

Requerimientos técnicos:  Browser: Any - 

Relación: [IsBasedOn] American Physical Society
[References] http://dx.doi.org/10.1103/PhysRevApplied.8.054049
[References] Physical Review Applied

Fecha de contribución: 11-abr-2018


* 2331-7019
* Dependence of the Thermal Conductivity of BiFeO₃ Thin Films on Polarization and Structure, Physical Review Applied 8, 5 (November 2017): 054049 © 2017 American Physical Society

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