Curie Temperature and Magnetization of Finite Superlattice with Random Irregularities

The Curie temperature and layer magnetization of ferromagnetic superlattices with random irregularities in modulation amplitude, thickness of layers and width of interdiffusion zones are studied in an extended version of the Kirkwood approximation. It is found that the increase of the deviation in the modulation amplitude gives rise to localized magnetism and the significant increase in the Curie temperature.