Journal
JOURNAL OF APPLIED PHYSICS
Volume 118, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4930034
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Funding
- Japan Society for the Promotion of Science (JSPS) [26106507, 25106003, 15K14119]
- Kanagawa Academy of Science and Technology
- Grants-in-Aid for Scientific Research [25106003, 26106507, 15K14119] Funding Source: KAKEN
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A new lithium-niobate (LiNbO3)-type polar compound, namely, ZnPbO3 (a = 5.41605(7) angstrom and c = 14.33151(3) angstrom), with closed-shell ions only was synthesized under high pressure and high temperature (8 GPa and 1273 K). A point-charge-model calculation based on atomic positions refined by Rietveld analysis of synchrotron X-ray diffraction data gave an electrical ionic polarization of 77 mu C/cm(2) along the hexagonal c-axis. Detailed structural analysis indicated that the contribution of Pb4+ in ZnPbO3 to the polarization was almost twice as large as that of Sn4+ in ZnSnO3. Transport measurement showed metallic behavior of ZnPbO3 from room temperature to low temperature despite the fact that both cations are closed-shell ions. (C) 2015 AIP Publishing LLC.
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