MICROKINETICS OF THE ISING-GLAUBER MODEL IN THE BINARY APPROXIMATION

Phase transitions in ferromagnets described by the Ising model are inv estigated in terms of the solution of a hierarchy of microscopic equat ions for unary and binary distribution functions, A dynamical procedur e for making the equations self-consistent is developed. For cubic cry stals, an equation of state relating the long-range order parameter to temperature and magnetic field is obtained in analytic form The tempe rature dependence of the magnetic susceptibility and of the specific h eat are calculated. A stability criterion is obtained for the stationa ry states of the system is obtained. The dynamics of magnetization rev ersal by constant and ac external fields are investigated, (C) 1998 Am erican Institute of Physics. [S1063-7834(98)02603-3].