摘要：Nanoparticles of Co Cu Cr La Fe O (x = 0.0, 0.025, 0.05, 0.075, 0.1) 0.7 0.3 0.5 x 1.5-x 4 were synthesized by sol-gel auto combustion method. The synthesized samples were annealed at 600 ºC for 4 h. X-ray diffraction data were used to evaluate the structure of the prepared samples. Lattice constant (a), X-ray density (dx), jump length (L and L ), A B allied parameters were calculated using X-ray diffraction data. Lattice constant and X- ray density found to increase with La3+ substitution. Ion jump lengths and allied parameters are increases with the increase in La3+ substitution. The variation of all the derived parameters are discussed in the light of difference in the ionic radii of La3+ ions Fe3+ ions.
