Anomalous structural feature of LiNbO{sub 3} observed using neutron diffraction

Journal Article · Tue Nov 01 00:00:00 EST 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.72.184108· OSTI ID:20719816

Fernandez-Ruiz, R; Bermudez, V ^[1]; Martin y Marero, D ^[2]

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1. Departamento Fisica de Materiales, Universidad Autonoma de Madrid 28049 (Spain)
2. Centro de Microanalisis de Materiales (Laboratorio del Acelerador), Universidad Autonoma de Madrid, 28049 Madrid, Spain and Institut Laue-Langevin, 6 rue Jules Horowitz, 38042 Grenoble, Rhone-Alpes (France)

An anomalous structural effect has been observed and analyzed on LiNbO{sub 3} at low temperature by neutron-diffraction experiments. Two minima in the unit-cell volume at 55 and 100 K related with maxima and minima in the volume vibrational isotropic factors of Li and Nb atoms, respectively, and a change in the curve slope of the spontaneous stress at 55 K have been identified. This fact, together with the shortening in distance of the Li and O layers at 55 K, has been related with variations in the Ps factor through the secondary pyroelectric effect.

• OSTI ID: 20719816
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 72, Issue 18; Other Information: DOI: 10.1103/PhysRevB.72.184108; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
CRYSTAL STRUCTURE
DISTANCE
ELECTRIC CHARGES
FERROELECTRIC MATERIALS
LAYERS
LITHIUM COMPOUNDS
NEUTRON DIFFRACTION
NIOBATES
POLARIZATION
PYROELECTRIC EFFECT
STRESSES
TEMPERATURE DEPENDENCE
VARIATIONS