Distribution of Crystal Structure in Epitaxial Pb(Zr_0.42,Ti_0.58)O₃ Film Grown on (111)_cSrRuO₃//(111)SrTiO₃ Substrate

Abstract

Distribution of crystal structure along the thickness direction for the epitaxial Pb(Zr,Ti)O₃ thick film on (111) _c SrRuO₃//(111)SrTiO₃ substrate with Zr/(Zr + Ti) = 0.42 was investigated using micro-Raman spectroscopy. The XRD result showed that the Pb(Zr,Ti)O₃ thick film consisted of the mixture of the tetragonal and rhombohedral phases. In addition, it was revealed by micro-Raman spectroscopy that the rhombohedral phase was dominant near the substrate. This trend was opposite from that of the Pb(Zr,Ti)O₃ thick film on (100) _c SrRuO₃//(100)SrTiO₃ substrate. These results indicate that the distribution of crystal structure along the thickness direction for the Pb(Zr,Ti)O₃ films depends on the crystal orientation of the films.

Keywords:

• Pb(Zr
• Ti)O₃
• tetragonal phase
• rhombohedral phase
• morphotropic phase boundary
• micro-Raman spectroscopy
• two-phase coexistence
• depth distribution

Acknowledgments

This work partly was supported by the Sasagawa Scientific Research Grant from the Japan Science Society.