Structural transition induced by the release of residual stress in the complex of cubic and monoclinic Gd₂O₃:Eu nanoparticles

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• 作者：Shiyong Gao ; Hongliang Lu ; Yanguang Nie ; Haiyong Chen ; Dan Xu ; Quanqin Dai ; Jiahua Zhang ; Chunxiao Gao ; Shihai Kan ; Dongmei Li ; et al.
• 关键词：Gd₂O₃ ; Eu ; Nanomaterials ; Luminescence ; Crystal structure
• 刊名：Materials Letters
• 出版年：2007
• 出版时间：July 2007
• 年：2007
• 卷：61
• 期：18
• 页码：4003-4005
• 全文大小：178 K

文摘

The Photoluminescence (PL) spectra of Gd₂O₃:Eu composed of cubic and monoclinic structure were collected on November 2003 and June 2006, respectively. The results show that a portion of cubic Gd₂O₃ transforms into monoclinic after the sample was left as it is for two years; and the ⁵D₁–⁷F_J emission of Eu³⁺ in cubic host was enhanced in this released complex. Considering the high pressure behavior of Gd₂O₃, we think this structural transition is due to the sample that endures a process of press and release while the residual stress is released slowly.