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|Title:||The magnesium diffused layer characteristics of a lithium niobate single crystal with magnesium-ion indiffusion|
|Authors:||Que, W. |
Electron probe microanalysis
LiNbO3 single crystal
X-ray diffraction analysis
|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|
|Appears in Collections:||Staff Publications|
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