Photoluminescence investigations on the nanoscale phase transition in Pb(Mg1/3Nb2/3)O3

被引：1
作者：
Sivasubramanian, V. [1 ]
Kesavamoorthy, R.
Subramanian, V.
机构：
[1] Indira Gandhi Ctr Atom Res, Div Mat Sci, Kalpakkam 603102, Tamil Nadu, India
[2] Indian Inst Technol, Dept Phys, Madras 600036, Tamil Nadu, India
来源：
SOLID STATE COMMUNICATIONS | 2007年 / 142卷 / 11期
关键词：
relaxor ferroelectrics; core-shell nanostructure; phase transition; photoluminescence;
D O I：
10.1016/j.ssc.2007.03.016
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The temperature dependence of the photoluminescence spectra of the relaxor ferroelectric Pb(Mg1/3Nb2/3)O-3 has been reported. The temperature behaviours of the 1.57, 1.67 and 1.73 eV bands indicate a phase transition at 110 K. This is attributed to a structural phase transition in the charged nanoshell. Analysis of the temperature dependence of 1.67 eV band intensity with a thermal quenching model indicated the existence of a phonon mode at 1153 cm(-1). This mode is identified in the Raman spectra measurement. The intensity of the 1.73 eV band showing an anomalous behaviour at 210 K is attributed to a transition from a crystalline phase to an amorphous phase in the charged nanoshell. (c) 2007 Elsevier Ltd. All rights reserved.
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页码：651 / 654
页数：4
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