Chalcogen, Rare earth, Transitional, Karen

• Ba-Fe-O-Y
• Ba-Fe-Gd-O
• Ba-Fe-Nd-O
• Ba-Eu-Fe-O
• Ba-Fe-O-Sm
• magnetic properties
• structural properties
• Moessbauer spectra
• thermal and thermodynamic properties
• electronic and electrical properties
• oxide
• transitional
• chalcogen
• rare earth
• alkaline
• orthorhombic
• tetragonal
• cubic
• hexagonal
• monoclinic