Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 39: Micro- and nanostructured magnetic materials

MA 39.6: Vortrag

Donnerstag, 15. März 2018, 10:45–11:00, H 0112

Two dimensional transport of superparamagnetic beads in periodic artificial magnetic stray field landscapes with in-plane magnetization — •Jendrik Gördes¹, Dennis Holzinger¹, Johannes Loehr², Daniel de las Heras³, Thomas M. Fischer², and Arno Ehresmann¹ — ¹Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, D-34132 Kassel — ²Experimental Physics, Universität Bayreuth, D-95440 Bayreuth — ³Theoretical Physics, Universität Bayreuth, D-95440 Bayreuth

The transport of superparamagnetic beads on top of periodic magnetic patterns is of particular interest for Lab-on-a-chip (LOC) devices, which offer promising applications in biomedicine [1]. Directed transport is achieved by modulation of the magnetic potential energy landscape by superposing a time dependent external magnetic field loop to the internal magnetic field of the pattern. As a result, remotely controlled two dimensional movement is obtained which is topologically robust against perturbations. Magnetic domain patterns of different symmetries were fabricated by lithography and ion bombardment induced magnetic patterning (IBMP). Characterization was done by longitudinal magneto-optical Kerr magnetometry (L-MOKE) and magnetic force microscopy (MFM). Investigations of the transport behavior of superparamagnetic beads above these patterns were carried out by tracking and image analysis techniques.

[1] D. Holzinger, I. Koch, S. Burgard, and A. Ehresmann, ACS Nano 9, 7323-7331 (2015)