| dc.description.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 | en_US |
