Influence of vapor transport equilibration on surface composition of MgO : LiNbO3 crystal
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Pages (from-to) | Q115-Q118 |
Journal / Publication | ECS Journal of Solid State Science and Technology |
Volume | 4 |
Issue number | 9 |
Publication status | Published - 2015 |
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Abstract
The surface composition of 5 mol% (in growth melt) MgO-doped z-cut LiNbO3 crystal was modified using Li-poor vapor transport equilibration (VTE) process. The VTE-induced surface Li2O-content reduction ΔC was evaluated from the measured birefringence, and the ΔC dependence on VTE temperature T and time t were studied. The results show that the effect of T on ΔC follows the Arrhenius law, with a surface Li2O-content reduction constant of (1.3 ± 0.1) × 1011 mol% and an activation energy of 3.0 ± 0.1 eV, and the effect of t on ΔC is a square-root dependence, with ΔC = 0.17t0.51. Thus, a generalized empirical expression can be obtained to show the dependence of ΔC on T and t. A comparative study on undoped pure LN shows that the MgO doping has slight effect on ΔC. Based on the obtained dependence of ΔC on t, the solution to the Li+ out-diffusion equation is shown and verified experimentally to be an integral of complimentary error function. The results indicate that Li-deficientMgO-doped LiNbO3 material with desired surface Li2O-content can be produced by controlling the VTE temperature and duration.
Citation Format(s)
Influence of vapor transport equilibration on surface composition of MgO: LiNbO3 crystal. / Zhang, De-Long; Yang, Xiao-Fei; Du, Wan-Ying et al.
In: ECS Journal of Solid State Science and Technology, Vol. 4, No. 9, 2015, p. Q115-Q118.
In: ECS Journal of Solid State Science and Technology, Vol. 4, No. 9, 2015, p. Q115-Q118.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review