Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 50: Poster II
MA 50.45: Poster
Freitag, 15. März 2013, 10:30–13:30, Poster D
Supercritical parametric generation in a Ni81Fe19 microstripe — •Thomas Brächer1, 2, Philipp Pirro1, Alexander A. Serga1 und Burkard Hillebrands1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Gottlieb-Daimler-Straße 47, 67663 Kaiserslautern, Germany
Parallel parametric amplification [1] is an alternative method to excite spin-wave dynamics in microstructured elements, as recent experiments have shown the applicability of the technique to micron-sized Ni81Fe19 structures.[2,3]
We report on the supercritical evolution of parametrically generated spin-wave modes as a function of applied microwave power in a Ni81Fe19 microstripe employing parallel parametric amplification. The experimental observation is carried out using Brillouin light scattering microscopy. We find that depending on the applied external magnetic field, different transitions of the observed spin-wave mode profiles, like a transition from the first to the second transverse mode at low magnetic fields, can be found.
Thomas Brächer is supported by a fellowship of the Graduate School Materials Science in Mainz (MAINZ) through DFG-funding of the Excellence Initiative (GSC 266).
[1] E. Schlömann et al., J. Appl. Phys. 31, 386S (1960)
[2] T. Brächer et al., Appl. Phys. Lett. 99, 162501 (2011)
[3] H. Ulrichs et al., Phys. Rev. B 84, 094401 (2011)