In this study we examine variations in the structure of perovskite compounds of LaBa2Cu2O9, LaBa2CaCu3O12 and LaBa2Ca2Cu5O15 synthesized using the solid state reaction method. The samples’ compositions were assessed using X-ray fluorescence (XRF) analysis. The La: Ba: Ca: Cu ratios for samples LaBa2Cu2O9, LaBa2CaCu3O12 and LaBa2Ca2Cu5O15 were found by XRF analysis to be around 1:2:0:2, 1:2:1:3, and 1:2:2:5, respectively. The samples’ well-known structures were then analyzed using X-ray diffraction. The three samples largely consist of phases 1202, 1213, and 1225, with a trace quantity of an unknown secondary phase, based on the intensities and locations of the diffraction peaks. According to the measured parameters a, b, and c, every sample has a tetragonal symmetry structure. Each sample’s mass density was observed to alter as the lead oxide content rose. Scanning electron microscope (SEM) images of the three phases revealed that different Ca-O and Cu-O layers can cause different grain sizes, characterized by elongated thin grains, without a preferred orientation.

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions

• Kareem Ali Jasim(Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad, Baghdad 10001, Iraq)
• Hind Abdulmajeed Mahdi(Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad, Baghdad 10001, Iraq) Corresponding author
• Rafah Ismael Noori(Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad, Baghdad 10001, Iraq)
• Marwa Ayad Abdulmajeed(Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad, Baghdad 10001, Iraq)