On Phase Diagrams of the Extended Mean Field Model for Spin Glasses —Mean Field Description of Random Network Model for Spin Glass-Ferromagnetic Systems—

抄録

The extended mean field model introduced previously by the present author is reexamined to show that the model can describe a rich variety of phase diagrams caused by competition between the spin glass (SG) order and ordinary linear orders such as the ferromagnetic (FM) one. It is applied to the mean field description of the random network model for SG–FM systems, and qualitative aspects of its phase diagrams are investigated in some detail in comparison with those of the original Sherrington-Kirkpatrick model.