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Optical birefringence study of the ferroelectric phase transition in lithium niobate tantalate mixed crystals: LiNb1-xTaxO3

Wood, IG; Daniels, P; Brown, RH; Glazer, AM; (2008) Optical birefringence study of the ferroelectric phase transition in lithium niobate tantalate mixed crystals: LiNb1-xTaxO3. J PHYS-CONDENS MAT , 20 (23) , Article 235237. 10.1088/0953-8984/20/23/235237.

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Abstract

The optical birefringence of a complete solid-solution series of lithium niobate-tantalate crystals has been measured as a function of temperature. It is found that, irrespective of composition, the high-temperature paraelectric phase has a birefringence close to +0.063, suggesting that this value arises purely from the oxygen octahedra in the crystal structure. It is also observed that a small addition of lithium niobate to the tantalate produces a crystal that has zero birefringence at room temperature.

Type: Article
Title: Optical birefringence study of the ferroelectric phase transition in lithium niobate tantalate mixed crystals: LiNb1-xTaxO3
DOI: 10.1088/0953-8984/20/23/235237
Keywords: 24 DEGREES C, X-RAY DIFFRACTION, TEMPERATURE DEPENDENCE, NEUTRON-DIFFRACTION, REFRACTIVE-INDEXES, CURIE-TEMPERATURE, SOLID-SOLUTION, LINBO3, GROWTH, LITAO3
UCL classification: UCL > School of BEAMS > Faculty of Maths and Physical Sciences
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences
URI: http://discovery.ucl.ac.uk/id/eprint/100113
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