Informational potentialities of the neural-like micromagnetic structures in polycrystalline garnet films

The formation problem of neural-like micromagnetic structures in a thin film magnetic media for associative memories and pattern recognition devices is considered. The discussion is based on Hopfield´s model of a system of collinear magnetic moments interacting arbitrarily in pairs. Haken´s finding which showed that the pattern recognition can be interpreted in term of nonequilibrium phase transition is also used. The magnetic materials for micromagnetic neural-like structures, in which patterns can be stored, must have appreciable ferromagnetic properties and be capable of realising many metastable micromagnetic states with a number of nearest interacting magnetic elements. High coercive force garnet films may be classified among such materials. Their grain-structure features make possible the “freezing” of quasi-periodic dynamic micromagnetic structures arising due to far-from-equilibrium phase transition