Local structure investigation of Eu doped SrSnO3 samples surrounding Sr site

In the present study, Eu doped SrSnO3 samples have been prepared and the local structure surrounding Sr atom has been studied by Synchrotron based EXAFS measurements at Sr K-edge (16105 eV). EXAFS analysis show that the average Sr-O bond distances show a marginal increase compared to the undoped sample. There is a general decreasing trend in the coordination number values for all samples upto 3% Eu doped SrSnO3. The introduction of Eu3+ replacing Sr2+ creates anionic vacancies to preserve the electronegativity in the system. The 4% Eu doped SrSnO3 sample shows unusually high coordination values in both Sr-O and Sr-Sn shell thus confirming increased perturbation in the lattice.