Electrical and Magnetic properties Comparison between LCMO and LSMO system

Abstract

Electrical and magnetic properties of La0.67Ca0.33MnO3 and La0.67Sr0.33MnO3 systems were studied via solid-state reaction method. The studies have been carried out by powder X-ray diffraction analysis (XRD), resistance techniques by using D.C four point probe and magnetic susceptibility by using A.C susceptometer. These materials are extensively studied also by the substitution of rare-earth compound to understand the nature of transport phenomena in each system. From X-ray diffraction (XRD) patterns, the samples of LCMO and LSMO systems show single phase perovskite structure and our powder samples crystallize in a orthorhombic and rhombohedral structures respectively. The electrical transport studies exhibit metal to insulator transition (MIT) at low temperature, AC susceptibility studies exhibit ferromagnetic to paramagnetic transition with an antiferromagnetic ordering at low temperature.