Figure 5: Theoretical model results and schematics.
From: Emergent nanoscale superparamagnetism at oxide interfaces
(a) Schematics of core Mn3+ spins in A-type AFM configuration (black arrows) in LMO at N≤Nc=5. (b) For high electron concentrations at the LMO/STO interface, a metallic layer of thickness Ne with uniform FM order (red arrows) should be formed at the interface. (c) Theoretically derived phase separated state for N>Nc with SPM islands embedded in AFM matrix. (d) Schematic representation of hole-doped and electron-doped SPM islands in the case of electron transfer from Mn3+ orbitals at the top surface of LMO. (e) Calculated excess charge transfer per unit area q(N)=0.5(1−Nc/N) (blue) and the thickness of electron charge layer Ne (red) versus LMO thickness N. (f) The diameter (blue) and the magnetic moment (red) of the SPM islands versus N in the phase separated state. (g) The areal fraction of the SPM islands versus N.
