Berlin 2008 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 32: Postersession II: Spinstruct./Phase Trans. (1-10); Spinelectronics (11-15); Thin Films (16 - 36); Particles/Clusters (37-45); Multiferroics (46-54); Spindynamics/Spin Torque (55 - 76); Post Deadlines (77-79)

MA 32.28: Poster

Freitag, 29. Februar 2008, 11:15–14:00, Poster E

Magnetic properties of epitaxial Fe/GaAs(110) — •Igor Barsukov, Cihan Tomaz, Ralf Meckenstock, Jürgen Lindner, and Michael Farle — Fachbereich Physik and Center for Nanointegration (CeNIDE) Universität Duisburg-Essen, Lotharstrasse 1, 47048 Duisburg, Germany

Epitaxial Fe films in a thickness range from 15 to 30 monolayers (ML) were grown by in-situ molecular beam epitaxy on GaAs(110) at room temperature. The growth and structure of the films were characterized by Auger spectroscopy, low energy electron diffraction (LEED) and IV-LEED. In-situ angular dependent ferromagnetic resonance measurements (FMR) were performed to obtain a full set of anisotropy parameters. Beside the well known film thickness dependent magnetic reorientation transition [1], the investigation shows a characteristic change of anisotropies due to thermal tempering, by direct heating or by covering with flash-evaporated Ag atoms. The comparison of the two characteristic FMR angular dependences reveals that the magnetic transition is driven by a 90° rotation of uniaxial anisotropy axis; the higher order parameters being unchanged. A morphologic explanation of this phenomenon is discussed. This work was supported by DFG, SFB491.

[1] J. Appl. Phys. 89, 11, 7136-7138