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Control of spin-wave propagation using magnetisation gradients

 
: Vogel, M.; Aßmann, R.; Pirro, P.; Chumak, A.V.; Hillebrands, B.; Freymann, G. von

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Volltext urn:nbn:de:0011-n-5065113 (10 MByte PDF)
MD5 Fingerprint: 5e9af2ff0c5838263ac42b33a29dafe6
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Erstellt am: 15.8.2018


Scientific Reports 8 (2018), Art. 11099, 10 S.
ISSN: 2045-2322
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer ITWM ()

Abstract
We report that in an in-plane magnetised magnetic film the in-plane direction of a propagating spin wave can be changed by up to 90 degrees using an externally induced magnetic gradient field. We have achieved this result using a reconfigurable, laser-induced magnetisation gradient created in a conversion area, in which the backward volume and surface spin-wave modes coexist at the same frequency. Shape and orientation of the gradient control the conversion efficiency. Experimental data and numerical calculations agree very well. Our findings open the way to magnonic circuits with in-plane steering of the spin-wave modes.

: http://publica.fraunhofer.de/dokumente/N-506511.html