Karen, Rare earth, Transitional, Tetragonal

• 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
• magnetization
• electronic and electrical properties
• transitional
• rare earth
• oxide
• chalcogen
• alkaline