Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 16: Poster I
MA 16.12: Poster
Dienstag, 12. März 2013, 10:30–13:30, Poster D
Coupling effects at the interface of nanostructured BiFeO3/La0.7Sr0.3MnO3 und epitaxial strain — •Christian Mix1, 2, Simone Finizio1, 2, Robert Reeve1, Pascal Krauscheid1, Frank Demuth1, Christian Engel1, Mathias Kläui1, and Gerhard Jakob1 — 1Institute of Physics, Universität Mainz — 2Graduate school of excellence MAINZ, Mainz
BiFeO3 (BFO) is one of the few room temperature multiferroics, possessing antiferromagnetic and ferroelectric order [1, 2]. Imaging the domain structure with respect to the interface of artificial multiferroics is of increasing interest to understand the nature of magnetoelectric and exchange coupling at the interface [3].
Here, we report on heteroepitaxial growth of BiFeO3 thin films under different levels of epitaxial strain and buffered by LSMO of varying thickness. Piezo force microscopy (PFM) and reciprocal space maps are utilized to investigate the influence of epitaxial strain on crystal structure and ferroelectric domain structure. In addition, scanning electron microscopy with spin polarization analysis (SEMPA) and x-ray magnetic circular and linear diachroism (XMCD, XMLD) photo emission microscopy (PEEM) are used to investigate the ferromagnetic and antiferromagnetic domain structure in BFO/LSMO bilayer structures. Financial support by Stiftung Innovation für Rheinland- Pfalz (Project 961-386261/944) is gratefully acknowledged.
[1] N. Spaldin, M. Fiebig, Science 15, Vol. 309, no. 5733, (2005) [2] R.J. Zeches et al., Science 326, 977, (2009) [3] Q. He et al., Nature Com. 2, 225, (2010)