Stationary and transition processes in the region of coincidence of nuclear and electron magnetic resonances

The effect of macro- and microscopic inhomogeneity on the shape of the absorption line and on FMR and AFMR is studied theoretically under conditions when the nuclear and electron magnetic resonance frequencies are the same. It is shown that the shift of the FMR and AFMR resonance fields is proportional to the real part of the nuclear susceptibility. Stationary and some transition phenomena in the region of coinciding NMR and FMR are studied experimentally in thin ferromagnetic films by the spin echo method. It is shown that the imaginary and real parts of the nuclear susceptibility can each be derived from the stationary experiments