Synthesis and properties of Ln(3)Ti(2)TaO(11) mixed-layer perovskite-like compounds

Authors
Titov, YA Sych, AM Kapschuk, AA Yashchuk, VP
Citation
Ya. Titov et al., Synthesis and properties of Ln(3)Ti(2)TaO(11) mixed-layer perovskite-like compounds, INORG MATER, 37(3), 2001, pp. 294-297
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INORGANIC MATERIALS
ISSN journal
00201685 → ACNP
Volume
37
Issue
3
Year of publication
2001
Pages
294 - 297
Database
ISI
SICI code
0020-1685(200103)37:3<294:SAPOLM>2.0.ZU;2-D
Abstract
The Ln(3)Ti(2)TaO(11) (Ln = La, Pr) compounds (A(n)B(n)O(3n+2) family) with noncentrosymmetric layered perovskite-like structures were prepared by hea t-treating coprecipitated hydroxides, and their lattice parameters and dens ity were determined. The structural changes accompanying the formation of t hese compounds were studied. Analysis of x-ray diffraction data indicated t hat, in the structures of Ln(3)Ti(2)TaO(11), the LnTaO(4) and Ln(2)Ti(2)O(7 ) perovskite layers are stacked in an ordered manner. The spontaneous polar ization in Ln(3)Ti(2)TaO(11) was evaluated.