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MA: Fachverband Magnetismus
MA 48: Poster Session II
MA 48.36: Poster
Thursday, March 10, 2016, 15:00–18:00, Poster B1
Broadband spin-wave spectroscopy on a nanostructured ferrimagnetic thin film — •Stefan Mändl1, Florian Heimbach1, Stefan Weichselbaumer2, and Dirk Grundler3 — 1Physik Department E10, TU München, Garching, Germany — 2Walther Meißner Institut, TU München, Garching, Germany — 3Institut 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. It was found that the reciprocal-lattice vector provided by a periodic magnetic modulation in a metallic thin film adds to the wave vector of a Damon-Eshbach mode [1]. In our work, we explore 200 nm thick yttrium iron garnet (YIG) produced by liquid phase epitaxy by broadband spin-wave spectroscopy and excite spin waves using coplanar waveguides. We investigate spin waves induced in the unpatterned and periodically modulated YIG film containing a two-dimensional lattice of nanotroughs etched by argon ion milling. We compare our results with spin waves reported for a 20 nm thick ferrimagnetic YIG film produced by pulsed laser deposition [2]. The work is supported by the DFG via GR1640/5 in SPP 1538 and NIM.
[1] H. Yu et al., Nat. Commun. 4, 2702 (2013)
[2] H. Yu et al., Scientific Reports 4, 6848 (2014)