Regensburg 2013 – scientific programme

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DF: Fachverband Dielektrische Festkörper

DF 22: Poster II

DF 22.45: Poster

Friday, March 15, 2013, 10:30–13:30, Poster D

Supercritical parametric generation in a Ni₈₁Fe₁₉ microstripe — •Thomas Brächer^{1, 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)