Engineering Polarization Rotation in a Ferroelectric Superlattice

J. Sinsheimer, S. J. Callori, B. Bein, Y. Benkara, J. Daley, J. Coraor, D. Su, P. W. Stephens, and M. Dawber
Phys. Rev. Lett. 109, 167601 – Published 17 October 2012
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Abstract

A key property that drives research in ferroelectric perovskite oxides is their strong piezoelectric response in which an electric field is induced by an applied strain, and vice versa for the converse piezoelectric effect. We have achieved an experimental enhancement of the piezoelectric response and dielectric tunability in artificially layered epitaxial PbTiO3/CaTiO3 superlattices through an engineered rotation of the polarization direction. As the relative layer thicknesses within the superlattice were changed from sample to sample we found evidence for polarization rotation in multiple x-ray diffraction measurements. Associated changes in functional properties were seen in electrical measurements and piezoforce microscopy. The results demonstrate a new approach to inducing polarization rotation under ambient conditions in an artificially layered thin film.

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  • Received 2 May 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.167601

© 2012 American Physical Society

Authors & Affiliations

J. Sinsheimer1, S. J. Callori1, B. Bein1, Y. Benkara1, J. Daley1, J. Coraor1, D. Su2, P. W. Stephens1,3, and M. Dawber1,*

  • 1Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA
  • 2Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
  • 3Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973-5000, USA

  • *matthew.dawber@stonybrook.edu

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Issue

Vol. 109, Iss. 16 — 19 October 2012

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