Large spontaneous polarization in polar perovskites of PbTiO3–Bi(Zn1/2Ti1/2)O3. Issue 6 (11th April 2018)

• Record Type: Journal Article
• Authors: Pan, Zhao; Jiang, Xingxing; Chen, Jun; Hu, Lei; Yamamoto, Hajime; Zhang, Linxing; Fan, Longlong; Fan, Xi'an; Li, Yawei; Li, Guangqiang; Ren, Yang; Lin, Zheshuai; Azuma, Masaki; Xing, Xianran
• Is Part Of: Inorganic chemistry frontiers. Volume 5:Issue 6(2018)
• Page Start: 1277
• Page End: 1281
• Publication Date: 2018-04-11
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c8qi00184g
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : With the substitution of Bi(Zn0.5 Ti0.5 )O3, a continuously enhanced spontaneous polarization up to 112 μC cm −2 has been observed in (1 − x )PbTiO3 – x Bi(Zn0.5 Ti0.5 )O3 . Abstract : PbTiO3 –Bi(Zn1/2 Ti1/2 )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 )PbTiO3 – x Bi(Zn1/2 Ti1/2 )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(Zn1/2 Ti1/2 )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 ( P S ) 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 T C ( 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- P S in PbTiO3 -based ferroelectric materials by introducing isostructural perovskites with strong polarity.