Ramana murthy

• Fe-O-Zn
• Ba-Fe-O
• Ba-Fe-O-Sr
• Fe-Ni-O-Zn
• Fe-O-Sr
• electronic and electrical properties
• conductivity or resistivity
• activation energy
• values of activation energy
• electrical conductivity
• transitional
• chalcogen
• ferromagnetic
• ferrimagnet
• disordered
• cubic
• hexagonal