Regensburg 2010 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 10: Poster I

MA 10.33: Poster

Dienstag, 23. März 2010, 10:45–13:45, Poster A

Remote control of superparamagnetic nanobeads on magnetically patterned thin films — •Daniel Lengemann, Tanja Weis, Alla Albrecht, Jannick Langfahl-Klabes, Dieter Engel, and Arno Ehresmann — University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

He-ion bombardment were used to get a periodic magnetic patterning with alternating anisotropy directions in exchange biased MnIr/CoFe thin layers. In remanence superparamagnetic nanobeads were located at the domain walls where the strong stray fields reach their maximum. Within an external inhomogeneous magnetic field it is possible to saturate the sample, i.e. the periodic magnetic patterning and therewith the stray fields vanish and the nanobeads can follow the gradient of the field. This mechanism allows a controlled movement of the nanobeads. First results are shown.