Regular and chaotic dynamics of magnetization precession in ferrite-garnet films.
By numerically solving equations of motion and constructing the spectrum of Lyapunov exponents, nonlinear dynamics of uniformly precessing magnetization in (110) thin film structures with perpendicular magnetic bias is investigated over a wide frequency range of the alternating field. Bifurcational changes in magnetization precession and the states of dynamical bistability are discovered. Conditions for the realization of high-amplitude regular and chaotic dynamic regimes are revealed. The possibility of controlling those precession regimes by using external magnetic fields is shown. The features of time analogs of the Poincare section of trajectories in the chaotic regimes are studied.
Shutyĭ
Anatoliy M
AM
Ulyanovsk State University, Ulyanovsk, Russia.
Sementsov
Dmitriy I
DI