The Relation between Electrocaloric Effect and Non-Collinear Electric Fields: A Coarse-Grained Case Study of BaTiO3

Anna Grünebohm, RUB, Bochum, Germany
Lan-Tien Hsu, Institute of Materials Simulation, Friedrich-Alexander University of Erlangen-Nürnberg, Fürth,

The electrocaloric effect (ECE) is the adiabatic temperature change of a material in a varying external electrical field, which is promising for novel cooling devices [1]. Large responses are possible at ferroelectric phase transitions and the reversibilty and even the sign of the induced temperature change depend on the direction and strength of the applied field [2]. In this work, we do coarse-grained molecular dynamic simulations[3] to systematically explore the phase stability and the anisotropic nature of the ECE of ferroelectric perovskites. [1] A. Torelló and E. Defay, Adv. Electron. Mater. (2022) [2] A. Grünebohm, et al., Energy Technol. 6 (2018) [3] T. Nishimatsu, et al., Phys. Rev. B 78 (2008)

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