Polarization rotation and the electrocaloric effect in barium titanate

Wu, H. H. and Cohen, R. E. (2017): Polarization rotation and the electrocaloric effect in barium titanate. In: Journal of Physics-Condensed Matter, Vol. 29, No. 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.

• Item Type: Journal article
• Faculties: Geosciences > Department of Earth and Environmental Sciences
• Subjects: 500 Science > 550 Earth sciences and geology
• ISSN: 0953-8984
• Language: English