Dresden 2020 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 32: Multiferroics and Magnetoelectric Coupling I (joint session MA/KFM)
MA 32.10: Vortrag
Mittwoch, 18. März 2020, 12:00–12:15, HSZ 401
Polarized neutron reflectometry of magneto-electric coupling in Fe3O4/PMN-PT(011) artificial multiferroic heterostructures — •Patrick Schöffmann1, Anirban Sarkar2, Tanvi Bhatnagar2,3, Mai Hussain Hamed4, Stephan Geprägs5, Emmanuel Kentzinger2, Annika Stellhorn2, Brian Kirby6, Alexander Grutter6, Sabine Pütter1, Martina Müller4, and Thomas Brückel2 — 1Forschungszentrum Jülich GmbH, JCNS@MLZ, Garching, Germany — 2Forschungszentrum Jülich GmbH, JCNS-2 and PGI-4, JARA-FIT, Jülich, Germany — 3Forschungszentrum Jülich GmbH, ER-C-1 and PGI-5, Jülich, Germany — 4Forschungszentrum Jülich GmbH, PGI-6, Jülich, Germany — 5Walther-Meißner Institute, BAdW, Garching, Germany — 6NIST Center for Neutron Research, NIST, Gaithersburg, USA
Magnetoelectric coupling phenomena in artificial thin film heterostructures have attracted attention because of the rich application possibilities in data storage and novel devices. Growing a ferrimagnetic Fe3O4 thin film on a ferroelectric [Pb(Mg1/3Nb2/3)O3]0.7-[PbTiO3]0.3 (PMN-PT) substrate in (011) orientation constitutes a heterostructure that allows for control of magnetic properties via an applied out-of-plane voltage. Using SQUID magnetometry and polarised neutron reflectometry, a clear change in magnetisation strength and orientation through the sample depth can be observed, upon the application of voltage. The effects are different along the in-plane axes (100) and (011).