Optical studies of ferroelectric phase transition in deuterated triglycine sulfate crystals

Optical studies of ferroelectric phase transition in deuterated triglycine sulfate crystals

We report on precise experimental measurements with the Senarmont technique of optical birefringence in partly deuterated triglycine sulfate crystals (DTGS, deuteration degree x ≈ 0.7) and interpretation of the influence of ferroelectric phase transition (PT) on the birefringence. The critical pheno...

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Bibliographic Details
Published in:Phase transitions Vol. 80; no. 1-2; pp. 89 - 94
Main Authors: Kushnir, O. S., Shopa, R. Y., Polovynko, I. I.
Format: Journal Article
Language:English
Published: Taylor & Francis Group 01-01-2007
Subjects:
Critical phenomena
Deuterated triglycine sulfate
Ferroelectric crystals
Fluctuations
Optical birefringence
Phase transitions
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Summary:We report on precise experimental measurements with the Senarmont technique of optical birefringence in partly deuterated triglycine sulfate crystals (DTGS, deuteration degree x ≈ 0.7) and interpretation of the influence of ferroelectric phase transition (PT) on the birefringence. The critical phenomena observed, not too close to the PT point, are quantitatively analysed. The fluctuation effects are shown to be fairly well described in terms of the approach of first fluctuation correction to the Landau theory. We have derived spontaneous electrooptic characteristics of DTGS and revealed that deuteration improves those characteristics.
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ISSN:0141-1594
1029-0338
DOI:10.1080/01411590601092761