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Regensburg 2022 – scientific programme

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MA: Fachverband Magnetismus

MA 33: Multiferroics and Magnetoelectric Coupling (joint session MA/KFM)

MA 33.2: Talk

Thursday, September 8, 2022, 15:15–15:30, H47

Contribution of charge and strain coupling in artificial multiferroic Fe3O4/PMN-PT heterostructures — •Patrick Schöffmann1,2, 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 Brückel21Synchrotron 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.

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