Berlin 2008 – wissenschaftliches Programm
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SYNF: Symposium Ferroic materials and novel functionalities
SYNF 1: Ferroic materials and novel functionalities I
SYNF 1.7: Vortrag
Dienstag, 26. Februar 2008, 12:00–12:15, A 151
Separation of magnetic and dielectric domains in BiFeO3 and BiCrO3 thin films — •Denny Köhler1, Ulrich Zerweck1, Christian Loppacher3, Stephan Geprägs2, Sebastian Gönnenwein2, Rudolf Gross2, and Lukas M. Eng1 — 1Institut für Angewandte Photophysik, Technische Universität Dresden — 2Walter-Meissner Institut, Bayrische Akademie der Wissenschaften, München — 3Laboratoire de Matériaux et Microélectronique de Provence, Universités Paul Cézanne, Marseille
In our work we present low-temperature noncontact-AFM investigations (nc-AFM) in combination with Kelvin Probe Force Microscopy (KPFM) and Magnetic Force Microscopy (MFM) to investigate the magnetic and ferroelectric properties of BiFeO3 and BiCrO3 thin films on the nm length scale. Samples are prepared as described in [1]. Complementary to nc-AFM measurements, Piezoresponse Force Microscopy (PFM) was used to deduce the ferroelectric polarisation of the investigated thin films.
Our experiments show that the separation of magnetic and electrostatic forces is possible by simultaneously running KPFM and MFM, but delicate due to the fact that both interactions are of long range nature. We show the separation of ferroelectric and magnetic domains on both materials and monitored a magnetic phase transition on BiCrO3.
[1] S. Geprägs et al., Phil. Mag. Lett. 87: 141-147 (2007)