Chalcogen, Ferroelectric, Transitional, Katiyar

• Fe-O-Pb-Ta
• Bi-Fe-O
• Fe-Nb-O-Pb
• Bi-Fe-La-O
• Fe-O-Pb-Ta-Ti-Zr
• electronic and electrical properties
• permittivity (dielectric constant)
• optical properties
• phonons
• magnetic properties
• oxide
• transitional
• chalcogen
• ferroelectric
• disordered
• tetragonal
• trigonal
• orthorhombic
• cubic
• monoclinic