Effect of A-Site Cation Size on the Structural, Magnetic and Electrical Properties of Mixed-Valence Perovskite Manganites
In the present study, mixed-valence perovskite manganite oxides has been synthesized by solid state reaction
method. The room temperature X-ray diffraction data were analyzed with the Rietveld analysis program GSAS for the
structure determination. The structure was refined with rhombohedral cell in the space group R-3c, assuming a pseudo-
Voight (pV) peak shape function. The crystallite size was estimated from XRD data using Scherrer equation. Electric
transport properties have been studied as a function of temperature from 5-300K and magnetic field from -8T to 8T using
four probe method. Magnetic properties have been studied as a function of temperature from 10-300K using SQUID
Keywords- Rietveld analysis, Electric and Magnetic properties.