Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Poster II: Bio- and Molecular Magnetism (1-9); Magnetic Coupling Phenomena/Exchange Bias (10-15); Magnetic Particlicles and Clusters (16-29); Micro and Nanostructured Magnetic Materials (30-51); Multiferroics (52-64); Spin Injection in Heterostructures (65-67); Spin-Dyn./Spin-Torque (68-93); Spindependent Transport (94-108)

MA 40.62: Poster

Freitag, 27. März 2009, 11:00–14:00, P1A

Pulsed laser deposited TbMnO₃ thin films on YAlO₃ with high crystalline quality — •Artur Glavic¹, Jürgen Schubert², Jörg Voigt¹, and Thomas Brückel¹ — ¹Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, 52425 Jülich — ²Institut für Bio- und Nanosysteme, Forschungszentrum Jülich GmbH, 52425 Jülich

We have chosen to deposit TbMnO₃ on YAlO₃ substrates because it has almost the same lattice parameters in plane as TbMnO₃ and a large difference in out of plane direction. Additionally the propagation vector of the magnetic spiral in the multiferroic state points out of plane. These two properties are advantageous for the use of scattering methods as the substrate- and filmpeaks are separated from each other and the magnetic structure can be probed by neutron diffraction easier. Multiferroic thin films of TbMnO₃ have already been fabricated using PLD on other Substrates as SrTiO₃ and LaAlO₃ in the orthorhombic and for example on ZrO₂ in the hexagonal phase.

We will present data from X-Ray diffraction experiments which show high crystalline quality (FWHM of less than 0.1 degree) and the obtained lattice constants of the epitaxial grown films. Rutherford back scattering with channelling of 2% could be observed, too. The temperature dependent magnetic properties have been probed with a SQUID magnetometer and an enhancement of the features compared to bulk has been found. The surface quality has been investigated by X-Ray reflectometry and atomic force microscopy.