Hamburg 2001 – wissenschaftliches Programm

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AM: Magnetismus

AM 9: Poster: Magnetowid. (1-17), Dü. Schichten (18-34), Oberfl
ächenmag. (35,36), Mikr. Methoden (37-45), Mikromag. (46-58), Phasenüberg. (59-77), Spektroskop. (78-91), Nanokr.Mat.(92-96), Anisotrop. (97-101), Schmelzen(102-104),Sonst/postdeadl.(105-109)

AM 9.101: Poster

Dienstag, 27. März 2001, 14:45–19:00, Foyer S 3

Anisotropy Effects in La_0.67Ca_0.33MnO₃ Thin Films on Vicinal Cut SrTiO₃ Substrates — •Rainer Praus and Hans-Ullrich Habermeier — MPI-FKF Heisenbergstrasse 1 70569 Stuttgart

We report on anisotropy effects in magnatization, hysteresis, and transport data of epitaxial La_0.67Ca_0.33MnO₃ films. The films were grown by pulsed laser deposition on vicinal cut SrTiO₃ (001) substrates with a tilt angle of 10^∘. These substrates have a stepped surface and step edges are aligned along the [010] direction. All measurements are classified with regard to these steps. Magnetic measurements were performed with the magnetic field vector in the film plane. The form of the hysteresis curve shows a distinct dependence on the angle between the magnetic field and the step edges. Furthermore this hysteresis anisotropy is affected by the film thickness. Both in zero field cooled as in field cooled magnetization measurements we observed an influence of the field orientation with regard to the step edges on the magnetization.The transport properties also reveal a clear anisotropy.