Generation of magnonic spin wave traps
  Spatially resolved measurements of the magnetization dynamics 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. On a CoFeB thin film magnonic crystal, Damon-Eshbach modes are expected to propagate away from the point of excitation. The experiments show that this propagation is frustrated by the strong temperature gradient 
Frederik Busse, Maria Mansurova, Benjamin Lenk, Marvin Walter, Markus   M\"unzenberg
cond-mat.mtrl-sci cond-mat.mes-hall