Antiferromagnetism 1 Brownmillerites 1 Charge transfer 1 Charge transfer energy Degrees of freedom (mechanics) 1 Doping (additives) 1 Electron-phonon interactions 1 Energy gap 1 Ferromagnetic materials 1 Ferromagnetism 1 Filling 1 Gap opening 1 Insulation 1 Iron compounds 1 Lanthanum compounds 1 Ligands 1 Metal insulator boundaries 1 Metal insulator transition 1 Metal-to-insulator transitions 1 Metallic phase 1 Metals 1 N-Doping 1 N-doped 1 Negative charge 1 Nickel compounds 1 Oxygen 1 Passivation 1 Perovskite 1 Spin degrees of freedom 1 Spin lattices 1