“…On the other hand, a considerable research interest has been devoted to study the physical properties of the trilayer systems both experimentally and theoretically in recent years. For example, NiFe/NiO/Co [1], Co/M/Fe 3 O 4 [2], NiFe/Cu/IrMn [3], Co/Ge/Co [4], Au/FePt/Au [5], LaBiMnO 3 /MgO/Co [6], Fe/Cr/Fe [7], NiFe/Bi/ NiFe [8], Co/Nb/Fe [9], Ni/Cu/Co [10], Co/Nb/Co [11], FeCo/Au/FeCo [12], NiFe/NB/ NiFe [13], Fe/MgO/Fe [14], Fe/Al/Fe [15], Pt/Co/Pt [16], FePt/Pt/Cr [17], YBCO/LCMO/YBCO [18], NiFe/FeMn/NiFe [19] have been studied experimentally. One can cite many more experimental works on trilayer systems.…”