Rare earth Sm 3+ doped LaCoO 3 cobaltite: Synthesis and characterizations

Abstract

Perovskite Cobaltite La 0.95 Sm 0.05 CoO 3 (LSCO) has been reported. The solid state reaction route has been employed and the sample formation has been confirmed via x-ray diffraction characterization. The XRD data investigation revealed the mono-phase rhombohedral structure (R-3c). The distorted rhombohedral structure for La 0.95 Sm 0.05 CoO 3 was further verified via Raman spectroscopic measurement. The dielectric measurement conveys good dielectric nature. The ac conductivity measurement reveals constant value of acat lower value of frequency but after a certain value of frequency, there is abrupt increase in the conductivity due to charge liberation at higher values of applied field. The four-probe dc measurement reveals the sample to be semiconducting in nature.