Published June 15, 2005 | Version v1
Journal article Metadata-only

Effects of Nd substitution on the polarization properties and electronic structures of bismuth titanate single crystals

Creators

  • 1. Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904 (Japan)
  • 2. Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904 (Japan) and PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012 (Japan)

Description

Single crystals of Nd-substituted Bi4Ti3O12 ferroelectrics were grown by a self-flux method, and the effects of Nd substitution on the polarization properties and optical transmission spectra of the crystals have been investigated. Bi3.52Nd0.48Ti3O12 crystals showed a smaller remanent polarization along the a axis of 29 μC/cm2 than Bi4Ti3O12 crystals (46 μC/cm2), and this result is in good qualitative agreement with the calculation of the spontaneous polarization based on Rietveld analysis of neutron diffraction. Electronic band structure calculations using the structural data suggest that the orbital hybridization between the Nd 5d and O 2p states stabilizes oxide ions in the perovskite layers, which is consistent with the much smaller leakage current observed for Nd-substituted crystals

Additional details

Identifiers

DOI
10.1016/j.materresbull.2005.02.025;
PII
S0025-5408(05)00068-1;

Publishing Information

Journal Title
Materials Research Bulletin
Journal Volume
40
Journal Issue
6
Journal Page Range
p. 1044-1051
ISSN
0025-5408
CODEN
MRBUAC

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
38054398
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BISMUTH OXIDES; CRYSTAL STRUCTURE; ELECTRONIC STRUCTURE; FERROELECTRIC MATERIALS; HYBRIDIZATION; LAYERS; LEAKAGE CURRENT; MONOCRYSTALS; NEUTRON DIFFRACTION; PEROVSKITE; POLARIZATION; TITANATES; TITANIUM OXIDES
Descriptors DEC
BISMUTH COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; CRYSTALS; CURRENTS; DIELECTRIC MATERIALS; DIFFRACTION; ELECTRIC CURRENTS; MATERIALS; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PEROVSKITES; SCATTERING; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Copyright
Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.