Alkaline, Transitional, Karen, Orthorhombic

• Ba-Fe-Nd-O
• Ba-Fe-Gd-O
• Ba-Fe-O-Y
• Ba-Fe-O-Tb
• Ba-Eu-Fe-O
• structural properties
• magnetic properties
• electronic and electrical properties
• thermal and thermodynamic properties
• phase transitions
• transitional
• chalcogen
• alkaline
• rare earth
• quaternary