Da silva pereira

• Co-Fe-Mn-O
• Co-Mn-O
• Co-Fe-Ni-O
• Co-Fe-O
• Ca-Ce-Mn-O
• magnetic properties
• electronic and electrical properties
• Moessbauer spectra
• structural properties
• conductivity or resistivity
• chalcogen
• transitional
• disordered
• oxide
• spinel
• cubic
• tetragonal
• orthorhombic