Dresden 2014 – scientific programme

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MA: Fachverband Magnetismus

MA 19: Poster I

MA 19.38: Poster

Tuesday, April 1, 2014, 13:00–15:30, P1

Parallel parametric amplification of externally excited spin waves in a microstructured Ni₈₁Fe₁₉ waveguide — •Thomas Braecher^1,2, Philipp Pirro¹, Thomas Meyer¹, Alexander A. Serga¹, and Burkrad Hillebrands¹ — ¹Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — ²Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, 67663 Kaiserslautern, Germany

Recently, the capability of parallel parametric amplification [1] to amplify thermal spin waves in microstructured elements has been demonstrated [2,3].

Here, we report on the parallel parametric amplification of spin waves which have been externally excited by a microstrip antenna. We show that the amplified spin waves can be detected over a distance of 30 µm, which is quite large in comparison to the spin-wave decay length of 6.3 µm for the investigated geometry. The experimental observation is carried out using microfocussed Brillouin light scattering spectroscopy.

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] T. Brächer et al., Appl. Phys. Lett. 103, 142415 (2013)