Please use this identifier to cite or link to this item:
|標題:||Structure and antiferroelectric properties of cesium niobate, Cs2Nb4O11||作者:||Smith, R.W.
|關鍵字:||structure;X-ray diffraction;antiferroelectricity;crystal;transition||Project:||Journal of Solid State Chemistry||期刊/報告no：:||Journal of Solid State Chemistry, Volume 180, Issue 4, Page(s) 1193-1197.||摘要:||
The compound cesium niobate, Cs2Nb4O11, is an antiferroelectric, as demonstrated by double hysteresis loops in the electric field versus polarization plot. The crystal structure refinement by X-ray diffraction at both 100 and 297 K shows it to have a centrosymmetric structure in point group mmm and orthorhombic space group Pima, which is consistent with its antiferroelectric behavior. The 100-K structure data is reported herein. The lattice is comprised of mobium-centered tetrahedra and octahedra connected through shared vertices and edges; cesium atoms occupy channels afforded by the three-dimensional polyhedral network. Antiferroelectricity is produced by antiparallel displacements of niobium atoms along the e-axis at the phase transition temperature of 165 degrees C. The critical field for onset of ferroelectric behavior in a single-crystal sample is 9.5 kV/cm at room temperature. (C) 2007 Elsevier Inc. All rights reserved.
|Appears in Collections:||期刊論文|
Show full item record
TAIR Related Article
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.