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 15.76: Poster

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

Patterned Fe/Cr/Co spin valve structures — •Frank Brüssing, Gregor Nowak, Hartmut Zabel, and Katharina Theis-Bröhl — Department of Physics, Ruhr-University Bochum, D-44780 Bochum

Weakly antiferromanetically coupled Fe/Cr/Co films were grown via molecular beam epitaxy on MgO (001). We designed the samples such that both magnetic layers (Fe and Co) have similar magnetization by adjusting their thicknesses. The structural quality of these multilayers was studied by X-ray reflectometry. The magnetic properties were measured by MOKE and SQUID.

The films were patterned into stripes using e-beam lithography with a negative photo resist. Subsequently the structure was etched via ion beam. Vektor-MOKE was performed as a function of the azimuthal angle. For the easy axis (stripes || external field) an extend plateau region is observed, which decreases by rotating the sample to the hard axis. These results were compared with Fe and Co stripes.

This project was supported by the DFG via SFB491.