A scenario for magnonic spin-wave traps.

Scientific reports

PubMedID: 26279466

Busse F, Mansurova M, Lenk B, von der Ehe M, M├╝nzenberg M. A scenario for magnonic spin-wave traps. Sci Rep. 2015;512824.
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.