Venkata ramana

• Bi-Mn-O-Ti
• Bi-Fe-La-O-Sr-Ti
• Bi-Na-O-Ti
• Bi-Fe-Na-O-Ti
• Bi-Fe-O-Sr-Ti
• electronic and electrical properties
• permittivity (dielectric constant)
• phase transitions
• structural transitions
• temperature for structural transition
• transitional
• chalcogen
• pnictogen
• ferroelectric
• quaternary
• orthorhombic
• trigonal
• tetragonal
• cubic
• monoclinic