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Title: A new LiNbO{sub 3}-type polar oxide with closed-shell cations: ZnPbO{sub 3}

A new lithium-niobate (LiNbO{sub 3})-type polar compound, namely, ZnPbO{sub 3} (a = 5.41605(7) Å and c = 14.33151(3) Å), 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 μC/cm{sup 2} along the hexagonal c-axis. Detailed structural analysis indicated that the contribution of Pb{sup 4+} in ZnPbO{sub 3} to the polarization was almost twice as large as that of Sn{sup 4+} in ZnSnO{sub 3}. Transport measurement showed metallic behavior of ZnPbO{sub 3} from room temperature to low temperature despite the fact that both cations are closed-shell ions.
Authors:
; ;  [1] ;  [2]
  1. Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226-8503 (Japan)
  2. Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8505 (Japan)
Publication Date:
OSTI Identifier:
22494824
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CATIONS; LEAD IONS; LITHIUM COMPOUNDS; NIOBATES; PLUMBATES; POINT CHARGE; POLAR COMPOUNDS; POLARIZATION; PRESSURE RANGE GIGA PA; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE RANGE 0400-1000 K; TIN IONS; X-RAY DIFFRACTION; ZINC COMPOUNDS