[19p-Z13-1~14] 6.1 Ferroelectric thin films

[19p-Z13-10] Domain structures of PbTiO₃ epitaxial thin films prepared on Sr(Zr, Ti)O₃-buffered substrates with various lattice constants

Tomohide Morikawa¹, 〇Masanori Kodera², Takao Shimizu³, Yoshitaka Ehara⁴, Hiroshi Funakubo^1,2 (1.Tokyo Tech., 2.Tokyo Tech., MCES, 3.NIMS, 4.NDA)

Keywords:ferroelectrics, thin films, domain structure

In this study, we focused on Sr(Zr, Ti)O₃ buffer layer, which has a cubic, tetragonal, and orthorhombic structure depending on its composition. Since the ratio of the largest lattice constant to the smallest lattice constant is less than 1.003, Sr(Zr, Ti)O₃ should work as a pseudo-cubic buffer layer. Series of Sr(Zr, Ti)O₃ buffer layer with various composition enables to control the strain precisely by successively changing their lattice constants. In this presentation, we report the domain structures of PbTiO₃ deposited on STO and LSAT substrates with Sr(Zr, Ti)O₃ buffer layer.