Preparation and crystal structure of La0.7Ba0.1Sr0.2Mn0.9Cu0.1O3 perovskite: a comparison between sol-gel and solid state process

Polycrystalline sample of La0.7Ba0.1Sr0.2Mn0.9Cu0.1O3 was successfully synthesized using sol-gel and solid state method. Despite the various condition employed during the process to synthesize the samples, the crystal structure of both samples show that both samples have formed a single phase without any impurities. Furthermore, in accordance with the same value of Goldschmidt factor, both samples crystallize with the same hexagonal structure and R (3) over barc space group. A slight difference appears in the more detailed aspect of crystal structure which are unit cell volume, Mn-O bond length, and Mn-O-Mn bond angle. The unit cell volume is 354.797 angstrom(3) for solid state method and 352.747 angstrom(3) for sol-gel method. The bond length and bond angle are 1.967 angstrom and 164.026 degrees for solid state method and 1.957 angstrom and 166.738 degrees for sol-gel method.