Spherulitic ferroelectrics
DOI:
https://doi.org/10.33910/Keywords:
thin ferroelectric films, lead zirconate titanate, spherulitic microstructure, lateral polarization, electron channelingAbstract
This article presents a review study of radially-radiant thin-film spherulites, which are unusual crystalline structures that remain virtually unexplored. These structures were studied in practically significant thin-film ferroelectric solid solutions of lead zirconate titanate, produced by a two-stage method of RF magnetron sputtering on silicon and glass-ceramic substrates. Scanning electron microscopy, piezoresponse force microscopy, X-ray diffraction analysis, and dielectric spectroscopy were used to study the films. The study discovered effects of radially oriented lateral polarization and electron channeling. The article provides explanations for the observed effects and estimates the contributions of various physical mechanisms to the magnitude of the lateral polarization.
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Alkoy, E. M., Alkoy, S., Shiosaki, T. (2007) The effect of crystallographic orientation and solution aging on the electrical properties of sol-gel derived Pb(Zr0.45Ti0.55) O3 thin films. Ceramics International, vol. 33, no. 8, pp. 1455–1462. https://doi.org/10.1016/j.ceramint.2006.06.010 (In English)
Brewster, D. (1853) On Cricular Crystals. Transactions of the Royal Society of Edinburgh, vol.20, part. 4, pp. 607–623. (In English)
Chen, S.-Y., Chen, I.-W. (1998) Texture Development, Microstructure Evolution, and Crystallization of Chemically Derived PZT Thin Films. Journal of the American Ceramic Society, vol. 81, no. 1, pp. 97–105. https://doi.org/10.1111/j.1151-2916.1998.tb02300.x (In English)
Da, B., Cheng, L., Liu, X. et al. (2023) Cylindrically symmetric rotating crystals observed in crystallization process of InSiO film. Science and Technology of Advanced Materials: Methods, vol. 3, no. 1, article 2230870. https://doi.org/10.1080/27660400.2023.2230870 (In English)
Elshin, A. S., Pronin, I. P., Senkevich, S. V., Mishina, E. D. (2020) Nelinejno-opticheskaya diagnostika polikristallicheskikh tonkikh plenok tsirkonata-titanata svintsa [Nonlinear optical diagnostics of thin polycrystalline lead zirconate titanate films]. Pis’ma v Zhurnal tekhnicheskoj fiziki, vol. 46, no. 8, pp. 32–35. https://doi.org/10.1134/S1063785020040215 (In Russian)
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Shtukenberg, A. G., Punin, Y. O., Gunn, E., Kahr, B. (2012) Spherulites. Chemical Reviews, vol. 112, no. 3, pp. 1805–1838. https://doi.org/10.1021/cr200297f (In English)
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