Berlin 2008 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 18: Poster I : Bio Magn. (1-2); Mag.Imgaging (3-9); Magn. Semiconductors (10-16); Half Metals & Oxides (17-20); Coupl.Phenomena (21-27); Magn. Mat. (28-41); Micro & Nanostr. Magn. Materials (42-61); Micro Magn. (62-64); Surface Magnetism (65-70); Transport Phenomena (71-85)

MA 18.6: Poster

Dienstag, 26. Februar 2008, 15:15–18:30, Poster E

Time-resolved PEEM measurements on single-crystalline Fe-structures — •Alexander Kaiser, Carsten Wiemann, Stefan Cramm, and Claus M. Schneider — Forschungszentrum Jülich, Institut für Festkörperforschung IFF-9, 52425 Jülich, Deutschland

Time-resolved photo-electron emission microscopy (TR-PEEM) provides a method for investigating the spatial and temporal magnetodynamics of micron-sized magnetic elements. By the use of e-beam evaporation thin films of (100)-oriented Iron in bcc-structure can be epitaxially grown on GaAs substrates with a Silver buffer layer. Due to their single-crystallinity the films exhibit a four-fold in-plane magnetocrystalline anisotropy. The films have been microstructured by lithographic techniques and the micromagnetic response on a short magnetic field pulse was investigated by the TR-PEEM technique. Compared to well-studied polycrystalline Permalloy samples the magnetocrystalline anisotropy gives rise to additional terms in the effective magnetic field, leading to different magnetodynamic behaviour. Results of the time-resolved measurements are presented and compared to those of anisotropy-free Permalloy structures.