Dresden 2017 – scientific programme
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MA: Fachverband Magnetismus
MA 64: Poster 1
MA 64.3: Poster
Friday, March 24, 2017, 09:30–13:00, P2-EG
Dzyaloshinskii-Moriya Interaction in FeGe samples: Ferromagnetic resonance and micromagnetic simulations — •Thomas Feggeler1, Ralf Meckenstock1, Zi-An Li1, Detlef Spoddig1, Iliya Radulov2, Konstantin Skokov2, Oliver Gutfleisch2, and Michael Farle1,3 — 1Fakultät für Physik, Universität Duisburg-Essen, 47057 Duisburg, Germany — 2Institut für Materialwissenschaft, TU Darmstadt, Alarich-Weiss-Str. 16, 64287 Darmstadt, Germany — 3Immanuel Kant Baltic Federal University, 236041 Kaliningrad, Russian Federation
We perform temperature and angular dependent Ferromagnetic Resonance (FMR) measurements (X-band) on bulk FeGe and FeGe in confined geometries. Results of a polycrystalline bulk B20-FeGe sample (diameter 3.78 mm, thickness 0.78 mm), manufactured by high pressure high temperature synthesis, show Dyson-shaped resonances with an angular dependent resonance field between 345 mT and 322 mT at 294 K. Cooling the sample to 152 K reveals several additional resonances in good agreement to [1]. An angular dependence of the resonances could not be detected below 280 K. FMR-Measurements of FeGe samples in confined geometries (6 µm x 200 nm x 20 nm) show several resonances in a small angular range between 270 K and 280 K, indicating a complex standing wave pattern as discussed in [2]. Additionally, we will show the results of supplementary static and dynamic micromagnetic simulations of the bulk and confined geometry FeGe. [1] Haraldson, S., et al. JMR, 1972. 8(3): p. 271-273. [2] Zingsem, B.W., et al., arXiv:1609.03417, 2016: p. 1-26.