Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Poster I

MA 19.9: Poster

Dienstag, 1. April 2014, 13:00–15:30, P1

Directed magnetic particle transport above magnetic stripe-patterned exchange-bias layer systems due to dynamic magnetic potential energy landscape transformation — •Dennis Holzinger, Iris Koch, and Arno Ehresmann — Department of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel

Magnetic stripe patterned exchange-bias (EB) layer systems with tailored domain wall charges between the in-plane magnetized magnetic domains,[1] fabricated via ion bombardment induced magnetic patterning (IBMP), are used for the directed transport of micron-sized superparamagnetic core-shell particles due to the dynamic transformation of the particles magnetic potential energy landscape during the application of small external magnetic field pulses without changing the samples magnetic state. A theoretical model is introduced to quantitatively calculate the magnetic particle velocity as a result of the spatial changes in the magnetic potential energy landscape, where the actual particle-substrate distance is for the first time investigated both experimentally and theoretically. Since the magnetic potential energy landscape can be precisely adjusted via IBMP, this system seems to be promising for tailoring the particle velocity as a function of the intrinsic material properties of the EB system.

[1] D. Holzinger, N. Zingsem, I. Koch, A. Gaul, M. Fohler, C. Schmidt and A. Ehresmann, J. Appl. Phys. 114, 013908 (2013)