Dresden 2020 – scientific programme

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 8: Multiferroics and Magnetoelectric Coupling I (joint session MA/KFM)

KFM 8.10: Talk

Wednesday, March 18, 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 Bhatnagar^2,3, 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(Mg_1/3Nb_2/3)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).