Study of Occupational Sites of Sm-Substituted BaTiO₃

Abstract

BaTiO₃ solid solutions containing rare-earth elements used for capacitors with multi-layer structure were prepared and their crystal structure was examined in order to determine preferential solubility site of rare-earth ions in perovskite structures. Since the ionic radius of Sm is in intermediate range between those of Ba and Ti, both Ba and Ti-site replacements can be considered in this study. The occupational site of Sm affected the lattice parameters. Transition mode of Sm incorporation between Ba and Ti-sites was discussed.