Studies on crystallographic and electrical behavior of neodymium substituted perovskite : La1-xNdxMnO3

Rashmi Chourasia, O. P. Shrivastava, Vijay Varma
2015 Zenodo  
Department of Chemistry, Dr. H. S. Gour Central University, Sagar-470 003, Madhya Pradesh, India E-mail : anuscript received online 29 December 2014, revised 26 March 2015, accepted 31 March 2015 Perovskite structured ceramic phases, namely, La0.9Nd0.1MnO3 (LMNd-1) and La0.7Nd0.3MnO3 (LMNd-3) synthesized by oxide route method crystallize in the rhombohedral symmetry (space group R-3c). Their structure refinement converged to satisfactory values of Rietveld parameters :
more » ... , Rwp and goodness of fit. Infrared absorptions of M-O stretching and bending vibrations have been assigned. Crystal morphology and composition of phases have been analyzed by scanning electron microscopy and energy dispersive X-ray analysis respectively. Electrical properties of material have been investigated by impedance spectroscopy in the frequency range 42 Hz to 5 MHz at temperatures between 50–300 ºC. Nyquist plots show the dominance of grain contribution and Debye-like relaxation in the materials. Conductivity data as a function of temperature and frequency suggest semiconducting behavior of the materials.
doi:10.5281/zenodo.5700974 fatcat:mevdcvicgzentjhgms7bwvsepa