Chalcogen, Conductor, Transitional, Hexagonal, Khan

• Ba-Co-Fe-O
• Ba-Co-Fe-Mn-O-Zr
• Co-Fe-O-Sr-Zn-Zr
• Ba-Co-Fe-Mg-O
• Ba-Ca-Fe-O
• magnetic properties
• electronic and electrical properties
• structural properties
• permittivity (dielectric constant)
• Moessbauer spectra
• transitional
• conductor
• semiconductor
• chalcogen
• oxide