O-Pb-Sc-Ta, Rare earth, Relaxor

• Hf-O-Pb-Sc-Ta
• La-O-Pb-Sc-Ta
• electronic and electrical properties
• optical properties
• phase transitions
• permittivity (dielectric constant)
• structural transitions
• relaxor
• transitional
• chalcogen
• rare earth
• ferroelectric
• cubic
• trigonal