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Abstract
Relaxor/ferroelectric super lattice films Pb(Sc 1/2 Nb 1/2 )O 3 /PbTiO 3 (PSN/PT) with different PT ratios are synthesized on the lattice cell scale by the pulsed laser deposition method. X-ray diffraction analyses reveal that fabricated and designed super-lattice (SL) periods coincide well within 6% error, and are uniform over thin film thickness of 100 nm. The lattice constant of PT in SL films shows an abrupt increase at a specific PT ratio of around 30%, which indicates the change in the a-axis to the c-axis domain configuration. The dielectric constant shows also the maximum at this PT ratio probably due to the dielectric anisotropy of PT, and it does not depend on the SL period.
Acknowledgments
This work is supported by Grants-in-Aid of Scientific Research (A) of MEXT and “High Technology Research” Project of MEXT, Japan.