Multiple nuclear spin echo in thin polycrystal ferromagnetic films

Generation of multiple nuclear spin echo signals in thin ferromagnetic polycrystalline films of 3d-metals and their alloys with the induced anisotropy within 22-300 K temperature range under double-pulse and three-pulse excitation was studied. Technique to determine experimentally contributions of various mechanisms into generation of spin echo signals is suggested. In ferromagnetic substances with radiofrequency field high amplification factor in the nucleus at observation of nuclear spin echo signals in nuclei with magnetic momentum high value under liquid helium temperature the mechanism of frequency modulation is shown to have essential impact