Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster I
MA 19.31: Poster
Dienstag, 1. April 2014, 13:00–15:30, P1
Improved Sensitivity for Ferromagnetic Resonance Measurements — •Anja Banholzer1, Kilian Lenz1, Ryszard Narkowicz2, and Jürgen Lindner1 — 1Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2Universität Dortmund
Nowadays the need for magnetic characterization of nanoscale ferromagnets is required. With conventional measurement methods it is usually necessary to measure a large array of the nano-sized objects of interest due to the low number of spins in the nanostructure. We developed a microresonator, which makes it possible to measure the ferromagnetic resonance on single nano-sized elements [1]. Conventional FMR needs at least 10^12 Spins to gain a decent signal . With the microresonator a thousandth of magnetic volume can still be measured. Further optimizations on the microresonators allow to increase the filling factor and the sensitivity. We investigated magnetic trilayer system with different spacer thicknesses of 25nm and diameters of 500nm.
[1]A. Banholzer, et. al., Nanotechnology 22 (2011)