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arXiv · 1011.4458

Fine tuning epitaxial strain in ferroelectrics: PbxSr(1-x)TiO3 on DyScO3

Gijsbert Rispens·Jeroen A. Heuver·Beatriz Noheda
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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 $x \approx$ 0.8. A series of PbxSr1-xTiO3 films grown by MBE show good agreement with the proposed phase diagram

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Gijsbert Rispens, Jeroen A. Heuver, Beatriz Noheda. 2010-11-19. Fine tuning epitaxial strain in ferroelectrics: PbxSr(1-x)TiO3 on DyScO3. https://doi.org/10.1063/1.3532103

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