Magnetically tunable electrical transport of multiferroic xLaFeO3- (1−x)PbZr0.58Ti0.42O3 (x = 0.2 and 0.3) nanocomposites

Abstract

Lanthanum based perovskite type composite materials of xLaFeO3- (1−x)PbZr0.58Ti0.42O3 (x = 0.2 and 0.3) based on ferrite (LaFeO3) and ferroelectric (PbZr0.58Ti0.42O3) phases are synthesized by the ‘solid state route process’. The structural characterization have been done through x-ray diffraction and field emission scanning electron microscope techniques. The complex impedance and modulus diagram illustrate the contribution of grain and grain boundaries effects towards the electrical conductivity attributing the non-Debye type phenomena. The relaxation frequency is changed with an application of magnetic fields ascribing the spin dependent mechanism of the electrical transport at the grain boundaries. The fitting of Nyquist diagram attributes the magnetic domain wall motion across the grain boundaries pinning center of the system. The nature of ac conductivity with an applied magnetic field is decreasing the presence of defect states in the interfaces of LaFeO3 and PbZr0.58Ti0.42O3 grains. It also corresponds to the occurance of strain mediation of piezomagnetic phase of nanocomposites. So, the present study is directed towards the query to know the detailed study of magnetic field dependence electrical transport properties of a system.