Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 34: Spin Dynamics and Transport: Magnonics

MA 34.5: Vortrag

Mittwoch, 22. März 2017, 10:30–10:45, HSZ 04

Broadband spin-wave spectroscopy (BSWS) and micro-focused Brillouin Light Scattering (µBLS) on a nanostructured ferrimagnetic thin film — •Stefan Mändl¹, Ioannis Stasinopoulos¹, and Dirk Grundler² — ¹Physik Department E10, TU München, Garching, Germany — ²Institut des Matériaux, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

Magnonics is a growing research field where one aims at controlling spin waves on the nanoscale. Microwave-to-magnon transducers are in particular important for coupling magnonic devices to conventional microwave circuits. In 20 nm thick yttrium iron garnet (YIG) it was found that the reciprocal-lattice vector provided by a periodic array of Py nanodisks added to the wave vector of a Damon-Eshbach mode [1]. We study the effect in thick YIG of 200 nm by broadband spin-wave spectroscopy and micro-focused Brillouin Light Scattering. Two-dimensional lattices of different geometries are prepared with Electron Beam Lithography and Evaporation of Py. We find varying spin-wave decay lengths for different geometries and resolve spin-waves with wavelength down to 100 nm. The work is supported by the DFG via GR1640/5 in SPP 1538 and NIM.

[1] H. Yu et al., Nat. Commun. 7, 11255 (2016)