Investigation on structural, ferroelectric and magnetic properties of BiFeO3-PbTiO3 multiferroic system

Magnetic and ferroelectric materials are time-honored subjects to study which led to some of the most important technological advances such as data storage devices, filtering devices, actuators and high performance insulators. The materials which exhibit coupling between two ordered parameters, i.e., spin and charge are called multiferroic materials. BiFeO 3 -PbTiO 3 is alsoone of the extensively studied multiferroic binary system in recent times. In the present report we have also studied the Sr modified BiFeO 3 -PbTiO 3 . The conventional solid state reaction technique is employed to prepare (1-x)BiFeO 3 -x(Pb 0.90 Sr 0.10 )TiO 3 with x = 0.2 and 0.3. The Rietveld refinement studies show the existence of morphotropic phase boundary between rhombohedral (R3c) and tetragonal (P4mm) phases for x = 0.3 and rhombohedral (R3c) phase for x = 0.2. The polarization-electric field loops reveal that the ferroelectricity is compositional dependent. Magnetic field dependent magnetization measurements show the antiferromagnetic behavior with weak ferromagnetic nature.