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Issue 6, 2018
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Large spontaneous polarization in polar perovskites of PbTiO3–Bi(Zn1/2Ti1/2)O3

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Abstract

PbTiO3–Bi(Zn1/2Ti1/2)O3 is considered to be a promising high-ferroelectric performance material in the Pb/Bi-based perovskite family. In the present study, a whole set of (1 − x)PbTiO3xBi(Zn1/2Ti1/2)O3 (0 ≤ x ≤ 1) solid solutions have been prepared by the conventional solid-state and high-pressure vs. high-temperature methods. The effect of Bi(Zn1/2Ti1/2)O3 on the crystal structure has been investigated by synchrotron X-ray powder diffraction. Unlike most PbTiO3-based perovskites, the present system exhibits a continuously enhanced tetragonality (c/a) and large spontaneous polarization (PS) properties. The enhanced c/a is ascribed to the large spontaneous polarization displacements induced by the strong Pb/Bi–O hybridization and coupling interactions between Ti/Zn and Pb/Bi cations, which can be evidenced from the lattice dynamics study and first-principles calculations. Accordingly, the TC (i.e., x = 0.5) is expected to be approximately 1000 °C if its perovskite structure can be stabilized. The present study provides a route to obtain large-PS in PbTiO3-based ferroelectric materials by introducing isostructural perovskites with strong polarity.

Graphical abstract: Large spontaneous polarization in polar perovskites of PbTiO3–Bi(Zn1/2Ti1/2)O3

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Publication details

The article was received on 27 Feb 2018, accepted on 25 Mar 2018 and first published on 26 Mar 2018


Article type: Research Article
DOI: 10.1039/C8QI00184G
Citation: Inorg. Chem. Front., 2018,5, 1277-1281
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    Large spontaneous polarization in polar perovskites of PbTiO3–Bi(Zn1/2Ti1/2)O3

    Z. Pan, X. Jiang, J. Chen, L. Hu, H. Yamamoto, L. Zhang, L. Fan, X. Fan, Y. Li, G. Li, Y. Ren, Z. Lin, M. Azuma and X. Xing, Inorg. Chem. Front., 2018, 5, 1277
    DOI: 10.1039/C8QI00184G

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