๐”– Bobbio Scriptorium
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A New Structural Model for Lithium Niobate

โœ Scribed by J. C. Vyas; G. P. Kothiyal; B. Ghosh; M. K. Gupta

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
403 KB
Volume
30
Category
Article
ISSN
0232-1300

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โœฆ Synopsis

A new model based on the crystal field theory is proposed for LiNbO,. According to this the central position of the Nb ions in oxygen octahedra is energetically unstable leading to the splitting of the potential energy curve into the one having two equivalent off-centered minima. The phase transition temperature T, is related to the average height of the barrier existing between these energy minima.

The model explains satisfactorily some of the properties of LiNbO, in the paraelectric and ferroelectric phases, which were not fully understood by earlier models.

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