Bi_(1.8)Nd_(0.2)Ti_4O_(11)的温致及压致软模相变研究  

PRESSURE AND TEMPERATURE-INDUCED SOFT MODE PHASE TRANSITION IN Bi_(1.8)Nd_(0.2)Ti_4O_(11)

作　　者：崔启良[1] 孟进芳[1] 邹广田[1] 赵永年[1] 李冬妹[1] 

机构地区：[1]吉林大学超硬材料国家重点实验室,长春130022

出　　处：《高压物理学报》1993年第2期110-114,共5页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金;博士点基金

摘　　要：采用背向散射的方法,测量了Bi_(1.(?)Nd_(0.2)Ti_4O_(11)的拉曼光谱。实验结果表明,该掺杂样品发生温致和压致软模相变的温度和压力分别为200℃和3.35GPa。文中讨论了相变点移动的原因及高频声子模随温度和压力的变化。The Raman apectra of Bi_(1.8)Nd_(0.2)Ti_4O_(11) have been measured by backward scattering,Experimental results show that the phase transition pressure and temperature are 3.35 GPa and 200C.respectively.The cause of the shbift in the phase transition point and te variation of the high frequency phonon mode with temperature or pressure.were discussed in this paper.

关 键 词：高压 高温 软模相变 钛酸铋 散射谱 

分 类 号：O521.2[理学—高压高温物理]