Fine tuning epitaxial strain in ferroelectrics: PbxSr(1-x)TiO3 on DyScO3
arXiv:1011.4458 · doi:10.1063/1.3532103
Abstract
Epitaxial strain can be used to modify the properties of ferroelectric thin films. From the experimental viewpoint, the challenge is to fine-tune the magnitude of the strain. We illustrate how, by using a suitable combination of composition and substrate, the magnitude of the epitaxial strain can be controlled in a continuous manner. The phase diagram of PbxSr1-xTiO3 films grown epitaxially on (110)-DyScO3 is calculated using a Devonshire-Landau approach. A boundary between in-plane and out-of-plane oriented ferroelectric phases is predicted to take place at 0.8. A series of PbxSr1-xTiO3 films grown by MBE show good agreement with the proposed phase diagram
The following article has been submitted to Applied Physics Letters
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