Frequency dependences of FMR in films with angular dispersion of the magnetic anisotropy

On the basis of a statistical model of noninteracting blocks, it is clarified that films with high angular dispersion (₀ 15–35°) are characterized by an asymmetric resonance curve whose amplitude _r and width H depend, in contrast to uniaxial films, on the angle of film rotation in its plane in large field domains and whose frequency dependences are related substantially to the angular dispersion; the presence of domains in the angular dependence of the resonance field where H_r is constant; an effective magnetic anisotropy field dependent on the frequency and with the limit valueH_K^eff=H_Kexp(–2a₀². The theoretical deductions are conformed by experiment.Translated from Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 75–81, July, 1987.