Super switching and control of in-plane ferroelectric nanodomains in strained thin films

S. Matzen (), O. Nesterov, G. Rispens, J. A. Heuver, M. Biegalski, H. M. Christen and B. Noheda
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S. Matzen: Zernike Institute for Advanced Materials, Solid State Materials for Electronics, University of Groningen
O. Nesterov: Zernike Institute for Advanced Materials, Solid State Materials for Electronics, University of Groningen
G. Rispens: Zernike Institute for Advanced Materials, Solid State Materials for Electronics, University of Groningen
J. A. Heuver: Zernike Institute for Advanced Materials, Solid State Materials for Electronics, University of Groningen
M. Biegalski: Center for Nanophase Materials Science, Oak Ridge National Laboratory
H. M. Christen: Center for Nanophase Materials Science, Oak Ridge National Laboratory
B. Noheda: Zernike Institute for Advanced Materials, Solid State Materials for Electronics, University of Groningen

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: Abstract With shrinking device sizes, controlling domain formation in nanoferroelectrics becomes crucial. Periodic nanodomains that self-organize into so-called ‘superdomains’ have been recently observed, mainly at crystal edges or in laterally confined nanoobjects. Here we show that in extended, strain-engineered thin films, superdomains with purely in-plane polarization form to mimic the single-domain ground state, a new insight that allows a priori design of these hierarchical domain architectures. Importantly, superdomains behave like strain-neutral entities whose resultant polarization can be reversibly switched by 90°, offering promising perspectives for novel device geometries.

Date: 2014
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DOI: 10.1038/ncomms5415

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