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MA: Fachverband Magnetismus
MA 39: Magnetic Particles
MA 39.13: Talk
Thursday, March 10, 2016, 12:45–13:00, H31
Magnetically patterned rolled-up exchange bias tubes: A paternoster for superparamagnetic beads — •Timo Ueltzhöffer1, Robert Streubel2,3, Iris Koch1, Dennis Holzinger1, Denys Makarov2,4, Oliver G. Schmidt2,5, and Arno Ehresmann1 — 1Department of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel (Germany) — 2Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstrasse 20, 01069 Dresden (Germany) — 3Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA) — 4Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., 01328 Dresden (Germany) — 5Technische Universität Chemnitz, Strasse der Nationen 62, 09111 Chemnitz (Germany)
Artificially engineered parallel stripe magnetic domains in exchange bias layer systems were rolled-up into tubular architectures with azimuthally aligned magnetic domain patterns.[1] These objects were used for a paternoster-like transport of superparamagnetic beads through and above the tube by applying periodic pulse sequences of very weak external magnetic fields. This approach paves the way towards novel perspectives and applications in biotechnology, including particle transport related phenomena and lab-on-a-chip devices.
[1] Schmidt, O.G. and Eberl, K. Nanotechnology: Thin solid films roll up into nanotubes. Nature 410, 168 (2001).