標題: Destruction of the short-range disorder due to erbium doping in Pb(0.8)La(0.2)TiO(3)films
作者: Huang, Tung-Ching
Hsieh, Wen-Feng
光電工程學系
Department of Photonics
關鍵字: X-ray diffraction;crystal structure;rare earth;lattice dynamics;emission
公開日期: 1-May-2010
摘要: We show the destruction of a displacement of Ti in the short-range structure by observing the disappearance of emission and Raman signals when the Er(3+) concentration exceeds 7 mol% in sol-gel-derived Pb(0.8)La(0.2)TiO(3) polycrystalline films. It is believed that there always exists disorder due to displacement of B ions in the skeleton of BO(6) in perovskite ABO(3) materials. This disorder due to the displacement of Ti ions breaks the center of symmetry to activate emission of rare-earth ions such as Er(3+) and Raman modes of perovskites. We found that the breaking of symmetry can be diminished by introducing more Er(3+) ions. Copyright (C) 2009 John Wiley & Sons, Ltd.
URI: http://dx.doi.org/10.1002/jrs.2474
http://hdl.handle.net/11536/5444
ISSN: 0377-0486
DOI: 10.1002/jrs.2474
期刊: JOURNAL OF RAMAN SPECTROSCOPY
Volume: 41
Issue: 5
起始頁: 553
結束頁: 557
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