Relaxation oscillations of Zeeman and dipole magnetizations of a   paramagnet under conditions of deep low-frequency modulation
  The relaxation oscillations of Zeeman and dipole magnetizaions in spin system of a solid paramagnet are theoretically analyzed under conditions of intermediate saturation of magnetic resonance and strong low-frequency modulation of the external magnetic field. Peculiarities of the relaxation oscillations in the synchronous detection regime are considered. 
M.D. Zviadadze, A.G. Kvirikadze, R.L. Lepsveridze, G.I. Mamniashvili,   N.M. Sozashvili