Regensburg 2007 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Poster:ThinFilms(1-33),Transp.(34-49),ExchBias(50-56),
Spindynamics(57-70),Micro-nanostr.Mat.(71-82),
Particles/Clust.(83-88), Mag.Imag./Surface(89-96),
Spinelectronics(97-109), Theory/Micromag.(110-116),
Spinstruct/Phasetr.(117-128),Magn.Mat.(129-139),
Aniso.+Measuring(140-145), MolMag.(146-152),
MSMA(153-156)

MA 15.8: Poster

Dienstag, 27. März 2007, 15:00–19:00, Poster A

Magnetism and Magnetic Microstructure in Heusler Alloy Based Thin Film Systems — •Alexander Kaiser, Diana Rata, Stefan Cramm, and Claus M. Schneider — Institut für Festkörperforschung IFF-IEE, Forschungszentrum Jülich, Germany

Due to high spin polarization at the Fermi level and structural compatibility to compound semiconductors half-metallic Heusler alloys are promising materials for spintronic devices such as magnetic tunnel junctions and spin injection elements. For this study single films and magnetic tunnel junctions of the Heusler alloys Co₂MnSi and Co₂FeSi were sputter-deposited. The films have been magnetically characterized by SQUID and the micromagnetic structure has been studied by photoelectron emission microscopy. By microstructuring the films the influence of a magnetic stray field could be investigated. Ferromagnetic coupling of the Co₂MnSi/MgO/Co₂FeSi trilayers was shown by exploiting the elemental selectivity of the X-PEEM technique.