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MA: Fachverband Magnetismus
MA 37: Micro- and Nanostructured Magnetic Materials
MA 37.2: Vortrag
Mittwoch, 22. März 2017, 09:45–10:00, HSZ 401
Magnetization dynamics of a single Fe-filled carbon nanotube detected by ferromagnetic resonance — •Kilian Lenz1, Ryszard Narkowicz1, Christopher F. Reiche2, Attila Kákay1, Thomas Mühl2, Bernd Büchner2, Dieter Suter3, Jürgen Fassbender1,4, and Jürgen Lindner1 — 1HZDR, Institute of Ion Beam Physics and Materials Research, Bautzner Landstr. 400, 01328 Dresden — 2Leibniz Institute for Solid State and Materials Research IFW Dresden, Helmholtzstr. 20, 01069 Dresden — 3Department of Physics, TU Dortmund, 44221 Dortmund — 4TU Dresden, 01062 Dresden
The precise magnetic characterization of a single nanostructure by e.g. ferromagnetic resonance is an experimental challenge as they lack the necessary sensitivity to measure single sub-micron-sized structures. Measurements of arrays of such elements are no alternative due to inhomogeneity. Microresonator FMR [1] can overcome these limitations boosting the FMR sensitivity by several orders of magnitude. Thus a single Fe-filled carbon nanotube (Fe-CNT) of 42 nm diameter [2] can be measured. A focused ion beam was used to shorten little-by-little the length of the Fe-CNT after each FMR measurement. Angle-dependent FMR measurements were performed to extract the anisotropy contributions. The narrow linewidth suggests that the Fe-filling is a well ordered crystal as confirmed by TEM. Supported by DFG MU1794/3-2. [1] A. Banholzer et al., Nanotechnology 22, 295713 (2011) [2] P. Banerjee et al., Appl. Phys. Lett. 96, 252505 (2010).