Regensburg 2022 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 14: Ferroics – Domains and Domain Walls 1

KFM 14.4: Vortrag

Mittwoch, 7. September 2022, 10:30–10:50, H5

Impact of strontium on domain wall mobility in barium titanate — •Aris Dimou1, Pierre Hirel2, and Anna Grünebohm11Ruhr-Uni. Bochum, Interdisciplinary Centre for Advanced Materials Simulation (ICAMS), Bochum, Germany — 2Univ. Lille, Unité Matériaux et Transformations (UMET), Lille, France

Solid solutions of barium-strontium titanate are widely used, environmentally friendly ferroelectric materials that are important for a plethora of applications [1,2]. The presence of domain walls are known to change the properties of a material, and its mobility is of key interest in contemporary electronic devices [3]. Surprisingly little attention has so far been paid to the impact of Sr on the domain wall mobility in barium titanate.

Here we present a microscopic study on the case of Sr inclusions in barium titanate. Our simulations reveal an increase in the activation energy for domain wall movement at the Sr inclusion. Suggesting that a thin Sr plane is enough to pin the domain wall.

[1] Acosta et al., BaTiO3-based piezoelectrics: Fundamentals, current status, and perspectives. Applied Physics Review, 4, 2017.

[2] Grünebohm et al., Interplay of domain structure and phase transitions: theory, experiment and functionality. J. Phys. L Condens. Matter, 34, 2022.

[3] Sharma et al., Functional ferroic domain walls for nanoelectronics. Currently. Open. Solid State Mater. Sci., 9, 2005.

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