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Institut f. Physik
FG Nanostrukturierte Materialien
Martin-Luther-Universitat
Halle-Wittenberg
Von-Danckelmann-Platz 3,
D-06120 Halle, Germany

Tel.:  +49 345 55 25321
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Abstract

Wid, Olga; Bauer, Jan; Müller, Alexander; Breitenstein, Otwin; Parkin, Stuart S. P.; Schmidt, Georg
Investigation of non-reciprocal magnon propagation using lock-in thermography
Journal of Physics D 50/13 (2017-04-14 13:30:16), 134001
DOI: https://doi.org/10.1088/1361-6463/aa5d24


We have investigated the unidirectional spin wave heat conveyer effect in a 200?nm thin yttrium iron garnet (YIG) film using lock-in thermography (LIT). This originates from the non-reciprocal propagation of magnons, which leads to an asymmetric heat transport. To excite the spin waves we use two different respective antenna geometries: a coplanar waveguide (CPW) or a 'microstrip'-like antenna on top of the YIG. By using the CPW and comparing the results for the Damon–Eshbach and the backward volume modes we are able to show that the origin of the asymmetric heat profile are indeed the non-reciprocal spin waves. Using the 'microstrip'-like geometry we can confirm these results and we can even observe a distinct excitation profile along the antenna due to small field inhomogeneities.

http://iopscience.iop.org/0022-3727/50/13/134001
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