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MA: Fachverband Magnetismus

MA 18: Poster I : Bio Magn. (1-2); Mag.Imgaging (3-9); Magn. Semiconductors (10-16); Half Metals & Oxides (17-20); Coupl.Phenomena (21-27); Magn. Mat. (28-41); Micro & Nanostr. Magn. Materials (42-61); Micro Magn. (62-64); Surface Magnetism (65-70); Transport Phenomena (71-85)

MA 18.55: Poster

Dienstag, 26. Februar 2008, 15:15–18:30, Poster E

Preparation and characterisation of Ni and Ni/Ag nanowire arrays in alumina — •Gesa Beck and Kerstin Petrikowski — Forschungsinstitut Edelmetalle und Metallchemie, Katharinenstr. 17, 73525 Schwäbisch Gmünd, Germany

Magnetic nanowires, fabricated by various methods, represent an important family of magnetic nanostructures. Imbedding magnetic nanowires in a regular matrix yields systems which are promising candidates for magnetic storage media. One example for such systems are magnetic nanowire arrays in alumina.

Nanoporous alumina with a self-organised hexagonal arrangement of the nanopores can be formed by anodic oxidation of aluminium. In the nanopores metallic nanowires can be electrodeposited, resulting in a nanowire array in alumina.

We prepared alumina with highly ordered nanopores by two-step anodisation and subsequently electrodeposited both Ni and Ni/Ag-layered nanowires in the nanopores. The systems were characterised by X-ray diffraction, high resolution scanning electron microscopy, magnetic hysteresis and magnetoresistance measurements.