Improvement in crystalline perfection, piezo‐electric property and optical transparency of in‐situ poled Fe–LiNbO 3  single crystals by post growth annealing and poling | Zendy

Budakoti G. C. | Zendy; Kumar B. | Zendy; Bhagavannarayana G. | Zendy; Soni N. C. | Zendy

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Improvement in crystalline perfection, piezo‐electric property and optical transparency of in‐situ poled Fe–LiNbO 3 single crystals by post growth annealing and poling

Author(s) -

Budakoti G. C.,

Kumar B.,

Bhagavannarayana G.,

Soni N. C.

Publication year - 2005

Publication title -

physica status solidi (a)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.532

H-Index - 104

eISSN - 1862-6319

pISSN - 1862-6300

DOI - 10.1002/pssa.200409081

Subject(s) - poling , annealing (glass) , materials science , piezoelectricity , dielectric , ion , analytical chemistry (journal) , fourier transform infrared spectroscopy , grain boundary , grain growth , crystallography , optoelectronics , optics , grain size , composite material , microstructure , ferroelectricity , chemistry , physics , organic chemistry , chromatography

Crystalline perfection, piezoelectric response and optical transparency of in‐situ poled Fe–LiNbO 3 single crystals was studied. Very low angle grain boundaries and the variations in the piezoelectric charge constant d 33 were observed in the as‐grown crystals. Grain boundaries were successfully removed at higher annealing temperatures but the d 33 value was decreased. Low crystalline perfection and d 33 were observed after poling the annealed specimen. These parameters were improved by low temperature annealing followed by very slow cooling. FTIR spectra revealed that OH – and CO 3 2– ionic defects were present in the as‐grown crystals. The OH – ion concentration was reduced, CO 3 2– ions were removed and optical quality was improved after annealing at higher temperatures. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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