Dresden 2014 – scientific programme
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MA: Fachverband Magnetismus
MA 18: Magnetic Coupling Phenomena
MA 18.4: Talk
Tuesday, April 1, 2014, 14:45–15:00, HSZ 403
Temperature dependent study of the magneto-electric coupling in BiFeO3/La0.7Sr0.3MnO3 (BFO/LSMO) artificial multiferroic heterostructures by high resolution x-ray microscopy — •S. Finizio1, C. Mix1, M. Buzzi2, F. Kronast3, F. Nolting2, G. Jakob1, and M. Kläui1 — 1Institut für Physik, Johannes Gutenberg Universität, 55128 Mainz, Germany — 2Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland — 3Helmholtz Zentrum für Materialien und Energie GmbH, 12489 Berlin, Germany
Artificial multiferroic systems, where coupling between the ferroelectric and ferromagnetic order is expected, have been object of intense research in the last years. One of such systems is the artificial multiferroic heterostructure BFO/LSMO, which combines BFO (ferroelectric and antiferromagnetic) with LSMO (ferromagnetic), for which an exchange-bias driven coupling, which could allow for the magnetic switching of the LSMO by switching the ferroelectric polarization in the BFO, is expected. In this contribution, a temperature-dependent analysis of the artificial multiferroic heterostructure BFO/LSMO has been carried out with high resolution x-ray microscopy. It was observed that the magnetization of the LSMO layer changes with the temperature, switching from an elongated stripe-like domain structure, typical of LSMO thin films without BFO, to a grain-like domain structure, which resembles the antiferromagnetic domains of the BFO layer. This leads thus to the observation that the BFO layer influences the magnetic structure of the ferromagnetic LSMO.