Exceptional physical properties of Ca, La and Nb co-substituted Sr2Bi4Ti5O18 ceramics. - Kalpana, A.; Rajitha, K.; Gouthamsri, S.; Kumar, R. Santhosh; Dhangar, Bharat Kumar; Sheik, Rameeza Begum; Lanka, Venkata Ramana Murthy; Nagalakshmi, K.; Reddy, N. Manohar; Sudarshan, Vadnala (Journal of Materials Science: Materials in Electronics, 2025)