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Diffusion control of an ion by another in LiNbO3 and LiTaO3 crystals.
- Source :
- Scientific Reports; 5/8/2015, p10018, 1p
- Publication Year :
- 2015
-
Abstract
- Diffusion-doping is an effective, practical method to improve material properties and widen material application. Here, we demonstrate a new physical phenomenon: diffusion control of an ion by another in LiNbO3 and LiTaO3 crystals. We exemplify Ti<superscript>4+</superscript>/X<superscript>n+</superscript> (X<superscript>n+</superscript> = Sc<superscript>3+</superscript>, Zr<superscript>4+</superscript>, Er<superscript>3+</superscript>) co-diffusion in the widely studied LiNbO3 and LiTaO3 crystals. Some Ti<superscript>4+</superscript>/X<superscript>n+</superscript>-co-doped LiNbO3 and LiTaO3 plates were prepared by co-diffusion of stacked Ti-metal and Er-metal (Sc2O3 or ZrO2) films coated onto LiNbO3 or LiTaO3 substrates. The Ti<superscript>4+</superscript>/X<superscript>n+</superscript>-co-diffusion characteristics were studied by secondary ion mass spectrometry. In the X<superscript>n+</superscript>-only diffusion case, the X<superscript>n+</superscript> diffuses considerably slower than the Ti<superscript>4+</superscript>. In the Ti<superscript>4+</superscript>/X<superscript>n+</superscript> co-diffusion case, the faster Ti<superscript>4+</superscript> controls the diffusion of the slower X<superscript>n+</superscript>. The X<superscript>n+</superscript> diffusivity increases linearly with the initial Ti-metal thickness and the increase depends on the X<superscript>n+</superscript> species. The phenomenon is ascribed to the generation of additional defects induced by the diffusion of faster Ti<superscript>4+</superscript> ions, which favors and assists the subsequent diffusion of slower X<superscript>n+</superscript> ion. For the diffusion system studied here, it can be utilized to substantially shorten device fabrication period, improve device performance and produce new materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20452322
- Database :
- Complementary Index
- Journal :
- Scientific Reports
- Publication Type :
- Academic Journal
- Accession number :
- 102575496
- Full Text :
- https://doi.org/10.1038/srep10018