THEORY OF INSULATING FERROMAGNETS OF SURFACE AND INTERFACE
表面与界面的绝缘铁磁理论

Using Green's function technique, we have discussed magnetization of surface and interface changes with temperature from T=0 to T=Tc. For the surface, result is in agreement with other authors. For interface, we not only fird that critical temperature is differente between interface and bulk, but also fird a relation: Tc1 < max(TcA,TcB).