Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 22: Poster session I

MM 22.25: Poster

Montag, 20. März 2017, 19:00–20:00, P4

Modeling the electrocaloric effect in ferroelectric solid solutions — •Anna Grünebohm¹, Takeshi Nishimatsu², and Ralf Meyer³ — ¹Faculty of Physics and CENIDE, University of Duisburg-Essen, Germany — ²Institute for Materials Research, Tohoku University, Japan — ³Department of Mathematics and Computer Science, Laurentian University, Sudbury, Canada

The electrocaloric effect (ECE) is the adiabatic temperature change of a material in a varying external electrical field. The ECE is promising for novel cooling devices [1]. However, in many ferroelectrics the large ECE is restricted to a narrow temperature interval. Solid solutions such as Ba_xSr_1−xTiO₃ are promising to tune the operation range. We discuss possible routes of modeling disordered solid solutions by means of ab initio based molecular dynamics simulations [2,3]. Furthermore, we present direct simulations of the ECE for Ba_xSr_1−xTiO₃ [4].

[1] X. Moya, et al., Nature Mater. 13, 439 (2014).

[2] T. Nishimatsu et al., J. Phys. Soc. Japn. 85, 114714 (2016).

[3] S. Tinte et al., J. Phys.: Condens. Matt. 16, 3495 (2004).

[4] M. Marathe, et al., Phys. Rev. B 93, 054110 (2016).