Berlin 2018 – scientific programme

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MA: Fachverband Magnetismus

MA 52: Poster II

MA 52.63: Poster

Thursday, March 15, 2018, 15:00–18:00, Poster C

Exchange coupling in multiferroics/ferromagnet heterostructures — •Sven Becker, Mehran Vafaee, Mathias Kläui, and Gerhard Jakob — Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany

The interface between the antiferromagnetic perovskite BiFeO₃ and a ferromagnet has been target of numerous research projects. The interlayer exchange coupling was often weak at room temperature^[1] or died after some time because of oxidation of the interface^[2]. Multiferroic Bi_1−xBa_xFeO₃/ferromagnet (x=0, 0.15) as well as TmFeO₃/ferromagnet heterostructures have been fabricated using pulsed laser deposition (PLD). As ferromagnetic layers La_0.7Sr_0.3MnO₃ and ferrimagnetic Sr₂FeMoO₆ have been deposited. Single crystal growth has been confirmed using XRD. Ferroelectric properties of Bi_0.85Ba_0.15FeO₃ have been proven by piezoresponse force microscopy (PFM). Heterostructures have been investigated with regard to the exchange coupling using a SQUID magnetometer. [1] M. Vafaee Appl. Phys. Lett. 108, 072401 (2016) [2] J. T. Heron, Nature 516, 370 (2014)