Structure and antiferroelectric properties of cesium niobate, Cs{sub 2}Nb{sub 4}O{sub 11}

Journal Article · Sun Apr 15 04:00:00 EDT 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2007.01.015· OSTI ID:21015764

Chunhua, Hu ^[1]; Jianjun, Liu ^[2]; Waining, Mei ^[2]; Lin, K -J ^[3]

---

1. Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588 (United States)
2. Department of Physics, University of Nebraska at Omaha, Omaha, NE 68182 (United States)
3. Department of Chemistry, Center of Nanoscience and Nanotechnology, National Chung-Hsing University, Taichung 402, Taiwan (China)

The compound cesium niobate, Cs{sub 2}Nb{sub 4}O{sub 11}, 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 Pnna, which is consistent with its antiferroelectric behavior. The 100-K structure data is reported herein. The lattice is comprised of niobium-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 c-axis at the phase transition temperature of 165 deg. C. The critical field for onset of ferroelectric behavior in a single-crystal sample is 9.5 kV/cm at room temperature. - Graphical abstract: The crystal structure of Cs{sub 2}Nb{sub 4}O{sub 11} is in the nonpolar point group mmm and centrosymmetric space group Pnna. This symmetry is consistent with antiferroelectric character, which the material exhibits, as shown by double hysteresis loops in the polarization versus electric-field plot.

• OSTI ID: 21015764
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 4 Vol. 180; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CESIUM COMPOUNDS
CRITICAL FIELD
ELECTRIC FIELDS
FERROELECTRIC MATERIALS
HYSTERESIS
MONOCRYSTALS
NIOBATES
ORTHORHOMBIC LATTICES
PHASE TRANSFORMATIONS
POLARIZATION
SPACE GROUPS
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TRANSITION TEMPERATURE
X-RAY DIFFRACTION