Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 55: Poster II
MA 55.5: Poster
Freitag, 4. April 2014, 10:30–13:30, P2
Evaluating the Gilbert damping in individual Co2Mn0.6Fe0.4Si microstructures via parametric amplification — •T. Sebastian1,2, T. Brächer1,3, P. Pirro1, Y. Kawada4, H. Naganuma4, A.A. Serga1, M. Oogane4, Y. Ando4, and B. Hillebrands1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Institut für Ionenstrahlphysik und Materialforschung, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — 3Graduate School Materials Science in Mainz, 67663 Kaiserslautern, Germany — 4Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
Recent experiments on spin dynamics in microstructures made of the Heusler compound Co2Mn0.6Fe0.4Si (CMFS) yielded promising results in the linear and nonlinear regime [1,2]. These results were attributed to the low Gilbert damping that was observed with standard ferromagnetic resonance (FMR) technique on homogeneous thin films. However, a quantitative analysis of the damping in CMFS microstructures is still lacking. We present an alternative method to evaluate the damping in individual CMFS microstructures using parametric amplification [3] and show that the low damping is preserved on the microscale.
We acknowledge support by the DFG Research Unit 1464 and the Strategic Japanese-German Joint Research from JST: ASPIMATT.
[1] T. Sebastian, et al., Appl. Phys. Lett. 100, 112402 (2012).
[2] T. Sebastian, et al., Phys. Rev. Lett. 110, 067201 (2013).
[3] H. Ulrichs, et al., Phys. Rev. B 84, 094401 (2011).