Studies of Structural, Microstructural and Electrical properties of Barium Titanate Modified Lead Iron Niobate Thesis submitted in partial fulfilment of the requirements for the degree of Master of Science (M. Sc.) in Physics Under the academic Autonomy National Institute of Technology, Rourkela By Sritama Pal Roll No: 411PH2106 Under the guidance of Dr. Dillip K Pradhan Department of Physics National Institute of Technology, Rourkela Rourkela-769008, Odisha, India.