Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/92802
Title: The magnesium diffused layer characteristics of a lithium niobate single crystal with magnesium-ion indiffusion
Authors: Que, W. 
Lim, S. 
Zhang, L.
Yao, X.
Keywords: Concentration distribution
Diffusion mechanisms
Electron probe microanalysis
LiNbO3 single crystal
Magnesium-ion indiffusion
Refractive index
X-ray diffraction analysis
Issue Date: Mar-1998
Source: Que, W.,Lim, S.,Zhang, L.,Yao, X. (1998-03). The magnesium diffused layer characteristics of a lithium niobate single crystal with magnesium-ion indiffusion. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers 37 (3 A) : 903-907. ScholarBank@NUS Repository.
Abstract: A Mg-ion indiffusion process was applied to lithium niobate single crystal substrates with a deposited magnesium oxide thin film. By means of electron probe microanalysis and X-ray diffraction analysis, the Mg concentration distribution along the depth of the magnesium diffused layer was obtained and the activation energy for Mg-ion indiffusion was determined to be 288 KJ/mol. It was also determined that the magnesium diffused layer exhibits a crystal structure of an unknown compound from the Mg-Li-Nb-O ternary system. It is proposed that this unknown compound and MgNb2U6, which form during a solid state reaction between the thin layer of MgO and the lithium niobate crystal in a Li2O-rich atmosphere, are the real sources for Mg-ion indiffusion into lithium niobate. The high activation energy and the appearance of this unknown compound in the magnesium diffused layer suggest that Mg-ions diffuse substitutionally into the lithium niobate crystal. Mechanisms causing a decrease in the refractive index of the Mg diffused layer are also discussed.
Source Title: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
URI: http://scholarbank.nus.edu.sg/handle/10635/92802
ISSN: 00214922
Appears in Collections:Staff Publications

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