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Berlin 2015 – scientific programme

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MA: Fachverband Magnetismus

MA 19: POSTER Ia

MA 19.26: Poster

Tuesday, March 17, 2015, 09:30–13:00, Poster A

Exchange Bias Tubes for controlled fuel-free transport of superparamagnetic particles — •Timo Ueltzhöffer1, Robert Streubel2, Dennis Holzinger1, Iris Koch1, Denys Makarov2, Oliver G. Schmidt2, and Arno Ehresmann11Department of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel — 2Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, D-01069 Dresden

Magnetically stripe patterned exchange bias tubes were fabricated and studied in respect to their suitability for fuel-free transport of superparamagnetic particles. For that purpose a CoFe/IrMn Exchange Bias (EB) system was fabricated via sputter deposition on a strained Ti-layer. The EB layer system is magnetically patterned with 5 µm parallel stripe domains with their magnetizations oriented head-to-head / tail-to-tail and subsequently rolled up by removal of the underlying sacrificial layer [1]. The resulting tubular system is suitable for being used as a substrate for the directed near surface transport of superparamagnetic particles [2]. In this study we were able to show that the transport system could be rolled up successfully to tubular structures while the magnetic properties are preserved.

[1] E. Bermúdez Urena, Y. Mei, E. Coric, D. Makarov, M. Albrecht and O. G. Schmidt, J. Phys. D: Appl. Phys. 42 (2009) 055001

[2] D. Holzinger, D. Lengemann, F. Göllner, D. Engel and A. Ehresmann, Appl. Phys. Lett. 100, (2012) 153504

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