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Dresden 2017 – scientific programme

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DF: Fachverband Dielektrische Festkörper

DF 9: Poster Session

DF 9.30: Poster

Tuesday, March 21, 2017, 14:00–16:00, P1C

Exchange coupling in multiferroic Bi1−xBaxFeO3/ferromagnet heterostructures — •Sven Becker, Mehran Vafaee, Mathias Kläui, and Gerhard Jakob — Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany

The BiFeO3/ferromagnet interface has been target of numerous researches. The effect of exchange coupling was often weak at room temperature [1] or dies after some time because of oxidation of the interface[2]. Multiferroic Bi1−xBaxFeO3/ferromagnet heterostructures have been fabricated using pulsed laser deposition (PLD). The focus laid on Bi0.75Ba0.15FeO3(BB15FO), which promises to have a larger magnetic moment than undoped BiFeO3 (BFO).[3] As ferromagnetic layers La0.7Sr0.3MnO3 and ferrimagnetic Sr2FeMoO6 have been deposited. Single crystal growth has been confirmed using XRD. Ferroelectric properties of BB15FO 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) [3] R. Das, J. Magn. Magn. Mater. 324, 1913 (2012)

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