Influence of calcium substitution on the structural, thermal, and electrical properties of PbTiO₃ perovskite. - Alrebdi, Tahani A.; Alkallas, Fatemah H.; Amin, Lamiaa G.; Abdel-Aty, Abdel-Haleem; Alshehri, Khairiah; Alofi, Amnah; Gomaa, Hosam M. (Journal of Materials Science: Materials in Electronics, 2025)