Berlin 2005 – scientific programme

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TT: Tiefe Temperaturen

TT 8: Posters Transport

TT 8.22: Poster

Friday, March 4, 2005, 14:00–18:00, Poster TU C

Transport properties of ferromagnetically filled multiwall carbon nanotubes — •H. Vinzelberg, M. Milnera, I. Mönch, D. Elefant, A. Leonhardt, J. Schumann, and B. Büchner — Leibniz Institute for Solid State and Materials Research (IFW) Dresden, Helmholtzstr. 20, D 01069 Dresden, Germany

In conventional semiconductor electronics the spin of the electrons is an unused quantity. However, spin dependent devices have a significant potential for data storage technology and future electronics. Due to their large spin-flip scattering length carbon nanotubes (CNTs) represent a promising candidate for spin dependent electronic devices. High magnetoresistance effects were recently discovered on ferromagnetically contacted CNTs. Ferromagnetically filled multiwall CNTs (MWCNTs) exhibit interesting magnetic properties. However, transport measurement results exist only on as grown two dimensional arrays of aligned Fe-filled MWCNTs. Here we investigate single ferromagnetically filled MWCNT devices produced by using an AC-electrophoresis deposition on predefined Au- or Ti- microfinger structures. The measured magnetotransport data show a broad spectrum of behaviour: positive and negative magnetoresistance, oscillations and shoulders.