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• Ba-Co-Fe-Ni-O
• Ba-Co-Fe-O
• Ba-Fe-Ni-O-Zn
• Ba-Fe-Ni-O
• Ba-Fe-O-Zn
• electronic and electrical properties
• conductivity or resistivity
• magnetic properties
• activation energy
• values of activation energy
• chalcogen
• transitional
• ferrimagnet
• alkaline
• semiconductor
• trigonal
• cubic
• hexagonal
• orthorhombic