Space-time focusing of a magnetostatic wave packet in a nonstationary medium
Preobrazhenskii V. L. , Rybakov V. P., Fetisov Yu. K.
The compression of a packet of magnetostatic waves propagating in a nonstationary dispersive medium (a ferromagnetic film) has been observed experimentally. This compression occurs as a result of the dependence of the group velocity of waves on the magnetizing field strength.