Regensburg 2022 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 29: Multiferroics and Magnetoelectric Coupling (joint session MA/KFM)

KFM 29.2: Vortrag

Donnerstag, 8. September 2022, 15:15–15:30, H47

Contribution of charge and strain coupling in artificial multiferroic Fe3O4/PMN-PT heterostructures — •Patrick Schöffmann^1,2, Anirban Sarkar², Mai H. Hamed², Tanvi Bhatnagar-Schöffmann³, Sabine Pütter⁴, Philippe Ohresser¹, Brian J. Kirby⁵, Alexander J. Grutter⁵, Juri Barthel⁶, Emmanuel Kentzinger², Annika Stellhorn², Martina Müller⁷, and Thomas Brückel² — ¹Synchrotron SOLEIL, France — ²Forschungszentrum Jülich GmbH, JCNS-2 and PGI-4, JARA-FIT, Germany — ³Centre de Nanoscience et de Nanotechnologies, CNRS, Université Paris-Saclay, France — ⁴Forschungszentrum Jülich GmbH, JCNS@MLZ, Germany — ⁵NIST Center for Neutron Research, USA — ⁶Forschungszentrum Jülich GmbH, ER-C-2, Germany — ⁷Fachbereich Physik, Universität Konstanz, Germany

To be able to develop denser and faster data storage and computing solutions artificial multiferroic heterostructures are a promising approach, as they enable direct switching of magnetic states with voltage. We grow ferrimagnetic Fe3O4 thin films on ferroelectric PMN-PT substrates to study the effect of strain and polarisation induced by the substrate onto the magnetic properties of the film. We found that the coupling due to strain and charge is strongly dependent on the orientation of the sample in an external magnetic field as well as the substrate cut. We will present a simple model to explain the contribution of strain and charge for different substrate and magentic field orientations.