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 18.75: Poster
Dienstag, 26. Februar 2008, 15:15–18:30, Poster E
Magnetoresistive Effects in Co/Pd Multilayers on Self-assembled Nanospheres — •Judith Moser1, Hans-Fridtjof Pernau1, Vojko Kunej1, Martina Suty1, Günter Schatz1, Elke Scheer1, and Manfred Albrecht2 — 1University of Konstanz, Department of Physics, D-78457 Konstanz, Germany — 2Chemnitz University of Technology , Institute of Physics, D-09107 Chemnitz, Germany
The deposition of Co/Pd multilayers on self-assembled spherical particles provides a system with unique magnetic properties. The magnetic caps on 200nm polystyrene spheres have perpendicular anisotropy, are single-domain, and magnetically decoupled, but in electrical contact. By applying an external magnetic field, the individual caps can be switched separately. This makes the system an interesting candidate for magnetoresistance measurements.
First results on a two dimensional array are reminiscent of GMR behaviour. We believe that the resistivity change is caused by spin dependent scattering in the magnetic caps. For a better understanding of the observed effects we developed a method based on template-assisted self-assembly that provides the possibility to contact a few magnetic caps only.
The system might be of interest for both fundamental aspects and technological application.