A scenario for magnonic spin-wave traps

Abstract

Spatially resolved measurements of the magnetization dynamics on a thin CoFeB film induced by an intense laser pump-pulse reveal that the frequencies of resulting spin-wave modes depend strongly on the distance to the pump center. This can be attributed to a laser generated temperature profile. We determine a shift of 0.5 GHz in the spin-wave frequency due to the spatial thermal profile induced by the femtosecond pump pulse that persists for up to one nanosecond. Similar experiments are presented for a magnonic crystal composed of a CoFeB-film based antidot lattice with a Damon Eshbach mode at the Brillouin zone boundary and its consequences are discussed.

DOI: 10.1038/srep12824

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@inproceedings{Busse2015ASF, title={A scenario for magnonic spin-wave traps}, author={F. Busse and Maria Mansurova and Benjamin Lenk and Marvin von der Ehe and M M{\"{u}nzenberg}, booktitle={Scientific reports}, year={2015} }