Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 23: Micro- and Nanostructured Magnetic Materials

MA 23.1: Vortrag

Mittwoch, 2. April 2014, 09:30–09:45, HSZ 403

A new template for in-situ characterization of electrodeposited nanowires using a sub-100 nm nanochannel array presented at the example of electron magnon scattering in iron nanowires — •Philip Sergelius, Josep M. Montero Moreno, Wehid Rahimi, Martin Waleczek, Robert Zierold, Detlef Görlitz, and Kornelius Nielsch — Institute of Applied Physics: University of Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany

We present a new generation of templates for nanowire growth and their in-situ characterization. Using Interference Lithography, Reactive Ion Etching and ALD, a flexible template consisting of cm-long parallel nanochannels with rectangular cross section and other dimensions as small as 40 nm can be created. In an illustration system, pulsed electrodeposition is carried out creating square shaped Fe nanowires (80x80x20000 nm). By design, the grown wires are in contact with an electrode system on both sides directly after the deposition. No further processing steps are required for electrical characterization. The surrounding oxide template remains intact during measurement, providing protection against breaking and oxidation. The developed chip enables us to conduct high field R(T,B)-measurements on electroplated Fe nanowires for the first time. We report values for the magnon mass renormalization which are in good agreement with literature.

Using the presented approach, we believe that electrical characterization of nanowires will be a lot easier in the future. Additionally it opens up the possibility to create stable transversal magnetic anisotropy in multisegmented magnetic nanowires.