Large spontaneous polarization in polar perovskites of PbTiO3-Bi(Zn1/2Ti1/2)O3
- Wuhan Univ. of Science and Technology, Wuhan (China); Univ. of Science and Technology Beijing, Beijing (China); Tokyo Institute of Technology, Yokohama (Japan)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Univ. of Science and Technology Beijing, Beijing (China)
- Tokyo Institute of Technology, Yokohama (Japan)
- Wuhan Univ. of Science and Technology, Wuhan (China)
- Argonne National Lab. (ANL), Argonne, IL (United States)
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)PbTiO3–xBi(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. In conclusion, the present study provides a route to obtain large-PS in PbTiO3-based ferroelectric materials by introducing isostructural perovskites with strong polarity.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; China Postdoctoral Science Foundation; USDOE
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1481011
- Journal Information:
- Inorganic Chemistry Frontiers, Vol. 5, Issue 6; ISSN 2052-1545
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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