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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Lei, Shiming
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Publications (5/5 displayed)
- 2021In-plane quasi-single-domain BaTiO<sub>3</sub> via interfacial symmetry engineeringcitations
- 2018Continuously Tuning Epitaxial Strains by Thermal Mismatchcitations
- 2015A labile hydride strategy for the synthesis of heavily nitridized BaTiO<sub>3</sub>citations
- 2014Inversion Symmetry Breaking by Oxygen Octahedral Rotations in the Ruddlesden-Popper NaRTiO<sub>4</sub> Familycitations
- 2013Effect of stoichiometry on the dielectric properties and soft mode behavior of strained epitaxial SrTiO<sub>3</sub> thin films on DyScO<sub>3</sub> substratescitations
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article
Effect of stoichiometry on the dielectric properties and soft mode behavior of strained epitaxial SrTiO<sub>3</sub> thin films on DyScO<sub>3</sub> substrates
Abstract
The effect of stoichiometry on the dielectric properties and soft mode behavior of strained epitaxial Sr<sub>1+x</sub>TiO<sub>3+ δ</sub> films grown on DyScO<sub>3</sub> substrates is reported. Direct comparisons between nominally stoichiometric and non-stoichiometric films have been performed through measurements of lattice parameters, temperature-dependent permittivities, second harmonic generation, and terahertz dielectric spectra. The nominally stoichiometric film shows dispersion-free low-frequency permittivity with a sharp maximum and pronounced soft mode behavior. Our results suggest that strained perfectly stoichiometric SrTiO<sub>3</sub> films should not show relaxor behavior and that relaxor behavior emerges from defect dipoles that arise from non-stoichiometry in the highly polarizable strained SrTiO<sub>3</sub> matrix.