NH_4NO_3掺杂Na^+、K^+、Ag^+、Pb_(2+)晶体相变拉曼峰强行为研究:掺杂效应的标度性  

On the Raman Intensity Behavior During Phase Transitions of Na + ,K + , Ag + and Pb 2+ Doped NH 4NO 3 Crystal:the Scaling Property of Doping Effect

作　　者：吴国祯[1] 马树国[1] 王焕茹[1] 

机构地区：[1]清华大学物理系

出　　处：《光散射学报》1998年第1期50-61,共12页The Journal of Light Scattering

基　　金：国家自然科学基金

摘　　要：从掺杂晶体（Ｎａ＋、Ｋ＋、Ａｇ＋、Ｐｂ２＋）ｘ（ＮＨ４）１－ｘＮＯ３相变时，拉曼峰强与温度的变化关系着手，深入讨论了掺杂离子的效应，揭示了其中的标度性质。本文分下列章节：（１）前言、（２）实验、（３）ｌｎＩＲ与ｌｎ｜Ｔ－Ｔｃ｜之线性关系、（４）不同振动模对不同掺杂程度的反应、（５）ν１振动模对不同离子掺杂的刻画、（６）‘反转’行为、（７）ｄｃ与Ｍ１／２的线性关系、（８）掺杂效应的标度性。From the variation of the Raman intensities against temperature during phase transitions, the doping effect is probed for the Na + , K + , Ag + and Pb 2+ doped NH 4NO 3 crystal, especially its scaling property. This article includes the following sections:(1)introduction, (2)experimental, (3)the linearity of ln I R against ln|T-T c|, (4) the responses of various vibrational modes to the different degrees of doping, (5)the characterization of different cationic dopings by the ν 1 mode, (6) the ‘cross over’ phenomenon, (7) the linearity of d c against M 1/2 , (8) the scaling property of the doping effect and (9) concluding remarks.

关 键 词：晶体掺杂效应 相变 标度性 拉曼散射 峰强 

分 类 号：O734.1[理学—晶体学]