Characteristics of MgO-doped LiNbO3 crystals

Congruent MgO:LiNbO3 single crystals doped with 0, 2.5, 5.0, 7.5 and 10.0 mol% of MgO were grown by the Czochralski method. The grown crystals were water clear without any precipitation. Their density and Curie temperature (Tc) were measured. The Curie temperature increased first with the MgO concen...

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Bibliographic Details
Published in:Materials letters 1995-06, Vol.24 (1-3), p.157-160
Main Authors: KIM, I. W, PARK, B. C, JIN, B. M, BHALLA, A. S, KIM, J. W
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Growth from melts
zone melting and refining
Materials science
Methods of crystal growth
physics of crystal growth
Optical materials
Optics
Other nonlinear optical materials
photorefractive and semiconductor materials
Physics
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Summary:Congruent MgO:LiNbO3 single crystals doped with 0, 2.5, 5.0, 7.5 and 10.0 mol% of MgO were grown by the Czochralski method. The grown crystals were water clear without any precipitation. Their density and Curie temperature (Tc) were measured. The Curie temperature increased first with the MgO concentration and decreased again when the concentration of MgO went beyond the threshold limit ((Mg)c, 5.0-7.5 mol%). Optical absorption edge and IR absorption spectra were measured at room temperature. The threshold concentration of nearly 6.0 mol% was estimated. The IR absorption peak appeared at 3470 cm-1 in 0-5.0 mol% and at 3534 cm-1 in 7.5-10.0 mol%; the peak shifted about 60 cm-1 towards the shorter wavelength side. 15 refs.
ISSN:0167-577X
1873-4979
DOI:10.1016/0167-577X(95)00063-1