Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 50: Poster II

MA 50.42: Poster

Freitag, 15. März 2013, 10:30–13:30, Poster D

Magnetoresistance of an individual ferromagnetic nanotube under microwave irradiation — •Tobias Stückler¹, Florian Heimbach¹, Rupert Huber¹, Daniel Rüffer², Eleonora Russo-Averchi², Martin Heiss², Anna Fontcuberta i Morral², and Dirk Grundler^1,3 — ¹Physik-Dep. E10, TU München, D-85748 Garching — ²LMSCX, IMX, EPF Lausanne, CH-1015 Lausanne — ³STI, EPF Lausanne, CH-1015 Lausanne

The magnetic states predicted for ferromagnetic nanotubes have generated great interest in both theoretical and experimental nanomagnetism research. Using atomic layer deposition, we have prepared 40 nm thick Ni nanotubes by conformal coating of single-crystalline GaAs nanowires with a diameter of about 300 nm. Subsequently, we position a several-µm-long nanotube on a Si substrate and integrate four metallic contacts. At room temperature, we measure the magnetic field dependent resistance under microwave irradiation using a neighboring antenna. We report on characteristic resonance features which we attribute to excited spin waves. Financial support by the EC (FP7/2007-2013) under Grant Agreement No. 228673 (MAGNONICS), the DFG via NIM, the SNF, and QSIT is gratefully acknowledged.