Diffusion control of an ion by another in LiNbO3 and LiTaO3 crystals

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • De-Long Zhang
  • Qun Zhang
  • Cong-Xian Qiu
  • Wing-Han Wong
  • Dao-Yin Yu

Detail(s)

Original languageEnglish
Article number10018
Journal / PublicationScientific Reports
Volume5
Publication statusPublished - 5 May 2015

Link(s)

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 Ti4+/Xn+ (Xn+ = Sc3+, Zr4+, Er3+) co-diffusion in the widely studied LiNbO3 and LiTaO3 crystals. Some Ti4+/Xn+ -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 Ti4+/Xn+ -co-diffusion characteristics were studied by secondary ion mass spectrometry. In the Xn+ -only diffusion case, the Xn+ diffuses considerably slower than the Ti4+. In the Ti4+/Xn+ co-diffusion case, the faster Ti4+ controls the diffusion of the slower Xn+. The Xn+ diffusivity increases linearly with the initial Ti-metal thickness and the increase depends on the Xn+ species. The phenomenon is ascribed to the generation of additional defects induced by the diffusion of faster Ti4+ ions, which favors and assists the subsequent diffusion of slower Xn+ ion. For the diffusion system studied here, it can be utilized to substantially shorten device fabrication period, improve device performance and produce new materials.

Research Area(s)

Citation Format(s)

Diffusion control of an ion by another in LiNbO3 and LiTaO3 crystals. / Zhang, De-Long; Zhang, Qun; Qiu, Cong-Xian; Wong, Wing-Han; Yu, Dao-Yin; Pun, Edwin Yue-Bun.

In: Scientific Reports, Vol. 5, 10018, 05.05.2015.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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