Electrical, Surface Morphology and Magneto-Capacitance Properties of Pb Free Multiferroic (BiFeO3)1-x(BaTiO3)x Solid Solutions

M. Shariqa,b, D. Kaur c, V.S. Chandela and M.A. Siddiqui a aDepartment of Physics, Integral University, Lucknow-226026, UP, India bDepartment of Physics, Preparatory Year, Jazan University, Jazan-114, Saudi Arabia cFunctional Nanomaterials Research Laboratory, Department of Physics and Centre of Nanotechnology, Indian Institute of Technology, Roorkee 247667, India

Received: August 4, 2014; Revised version: March 22, 2015; In final form: March 25, 2015

Full Text PDF

The solid solutions (BiFeO3)1-x(BaTiO3)x (x=0, 0.1, 0.2, 0.3, 0.4, and 0.5) have been synthesized adopting a solid state sintering route. Well crystalline phase of (BiFeO3)1-x(BaTiO3)x ceramics at different level of x has been optimized at sintering temperature of 950°C for 2 h. Dielectric, polarization and magnetocapacitance properties were investigated for different content level of BaTiO3. Dielectric constant increased with increasing concentration of BaTiO3 up to x=0.3 for all the frequencies of 10, 100, and 1000 kHz. Dielectric loss in the material is attributed to space charges, interfacial and dipolar polarizations. Measurements of P-E loop indicated evident ferroelectricity in all samples. Well formed grain with varying grain sizes and nearly uniform shape was found for ceramics samples.

DOI: 10.12693/APhysPolA.127.1675 PACS numbers: 78.20.Ci, 81.05.Je, 81.40.Rs, 68.37.Yz