Figure 3
The 3D phase diagram for the normalized parameters based on the spin-exchange model for the five spin configurations of the BFO/YBCO superlattice structure assuming 
.
(a) 
versus 
as viewed from the 
plane. (b) 
versus 
as viewed from the 
plane. (c) 
versus 
as viewed from the 
plane. (d) 
versus 
as viewed from the 
plane. The colors represent the borders between configuration regions (not the regions themselves.) The blue border confines the AFM-G0 region from the AFM-G1, AFM-G3 and AFM-G4 regions. The green border confines the AFM-G1 region from all other regions. The yellow border confines the AFM-G2 region from the AFM-G1, AFM-G3 and AFM-G4 regions. The red border confines the AFM-G4 region from all other regions. The purple dot in panels (a) and (c) denotes the ground state parameters determined from the total energy calculations through the density functional theory. This shows that AFM-G1 is the ground state spin configuration.
