Abstract
strained-layer superlattices of variable periodicity were grown by pulsed laser deposition on substrates. The layers were found to be strained in plane to match the substrate lattice parameter. Therefore, the applied strain is independent of the layer thickness. High-temperature x-ray diffraction was used to measure the ferroelectric-paraelectric phase transition temperature . For superlattice periodicity , , independent of . For , increases to 825 K at .
- Received 17 November 1997
DOI:https://doi.org/10.1103/PhysRevLett.80.4317
©1998 American Physical Society