ANILLOS MESOSCOPICOS BLOQUEO DE COULOMB Co-doped EFECTO KONDO Cerium Cerium compounds Cerium oxides Cobalt Ferromagnetism Oxygen Oxygen vacancies article magnetism A. Ceria A. Diluted magnetic oxides Ab initio Ce 4f state Cesium Charge localization Co Nanoparticles Co-doping Cobalt atoms D. Charge localization Degree of reduction Density functional theory Density functional theory calculations Deoxygenations Diluted magnetic oxide Electronic correlation Electronic structure