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Title: Large spontaneous polarization in polar perovskites of PbTiO3-Bi(Zn1/2Ti1/2)O3

Journal Article · · Inorganic Chemistry Frontiers
DOI:https://doi.org/10.1039/c8qi00184g· OSTI ID:1481011
 [1];  [2];  [3];  [3];  [4];  [3];  [3];  [5];  [5];  [5];  [6];  [2];  [4];  [3]
  1. Wuhan Univ. of Science and Technology, Wuhan (China); Univ. of Science and Technology Beijing, Beijing (China); Tokyo Institute of Technology, Yokohama (Japan)
  2. Chinese Academy of Sciences (CAS), Beijing (China)
  3. Univ. of Science and Technology Beijing, Beijing (China)
  4. Tokyo Institute of Technology, Yokohama (Japan)
  5. Wuhan Univ. of Science and Technology, Wuhan (China)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)
+ Show Author Affiliations

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
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Figures / Tables (4)

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