Nonlinear interactions of spin waves with parametric pumping in permalloy metal films

摘要: Nonlinear interactions of dipolar and dipole-exchange spin waves with microwave magnetic field parametric electromagnetic pumping were studied experimentally in thin permalloy (Py) films. It was demonstrated that Py films leads to efficient amplification the ``trace'' quasistanding created due two-magnon scattering by input signal pulse long-wavelength and, then, suppression amplified excitation short-wavelength exchange-dominated waves. was, also, shown nonlinear can be used for development processing devices measurement relaxation characteristics different spin-wave groups.