Ba-Fe-O, Chalcogen, Ferromagnetic, Oxide, Moessbauer spectra

• Ba-Cu-Fe-O-Y
• Ba-Co-Fe-O
• Ba-Co-Fe-O-Zn
• Al-Ba-Fe-O-Sr
• values of Moessbauer spectra
• isomer shift
• hyperfine magnetic field
• quadrupole splitting
• ferromagnetic
• oxide
• alkaline
• chalcogen
• transitional
• hexagonal
• trigonal
• tetragonal
• orthorhombic
• cubic