Karen, Tetragonal, Transitional

• Ba-Fe-O-Y
• Co-Fe-O-Pr-Sr
• Ba-Fe-Gd-O
• Ba-Er-Fe-O
• Ba-Eu-Fe-O
• magnetic properties
• structural properties
• Moessbauer spectra
• electronic and electrical properties
• magnetization
• transitional
• chalcogen
• oxide
• disordered
• alkaline