THE MAGNETIC-PROPERTIES OF A FERRIMAGNETIC BILAYER SYSTEM WITH DISORDERED INTERFACES

A calculation is presented via the standard mean-field theory for the magnetic properties (transition temperature, compensation temperature, and magnetization curve) of a ferrimagnetic multilayer system, consis ting periodically of two layers of spin-1/2 A atoms, two layers of spi n-3/2 B atoms, and a disordered interface in between that is character ized by a random arrangement of A and B atoms of A(p)B1-p type and a n egative A-B coupling. The consequences of the disordered interfaces an d different anisotropies between the bulk and interface for the magnet ic properties are examined. A number of characteristic behaviours, suc h as the possibility of two compensation points, are found for the mag netic properties.