Four-magnon decay and the kinetic instability of a magnetostatic traveling wave in yttrium garnet ferrite films
Zil'berman P. E., Nikitov S. A., Temiryazev A. G.
The formation of satellite waves has been observed for the first time in yttrium garnet ferrite films which become saturated in a normal magnetic field Η as a result of propagation of an intense magnetostatic wave. The formation of satellite waves is caused by the four-magnon decay of a magnetostatic wave which becomes a kinetic instability at high supercriticalities.