Polarization rotation and the electrocaloric effect in barium titanate

Wu, H. H. und Cohen, R. E. (2017): Polarization rotation and the electrocaloric effect in barium titanate. In: Journal of Physics-Condensed Matter, Bd. 29, Nr. 48, 485704

Abstract

We study the electrocaloric effect in the classic ferroelectric BaTiO3 through a series of phase transitions driven by applied electric field and temperature. We find both negative and positive electrocaloric effects, with the negative electrocaloric effect, where temperature decreases with applied field, in monoclinic phases. Macroscopic polarization rotation is evident through the monoclinic and orthorhombic phases under applied field, and is responsible for the negative electrocaloric effect.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• ISSN: 0953-8984
• Sprache: Englisch