Nonlinear properties of short-wavelength exchange-dominated spin waves
in ferrite films have beet studied experimentally. Collinear splittin
g of exchange spin waves into two waves has been observed. An yttrium-
iron-garnet film with smooth variation of the uniaxial anisotropy fiel
d through the film thickness has been used for the experimental study.
Nonuniformity of the file provided both the linear excitation of shor
t-wavelength pumping wave and the detection of the radiation caused by
the parametrically excited waves.