Dresden 2017 – wissenschaftliches Programm

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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 Lindner11HZDR, 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).

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