کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1596792 1002852 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photoluminescence investigations on the nanoscale phase transition in Pb(Mg1/3Nb2/3)O3
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Photoluminescence investigations on the nanoscale phase transition in Pb(Mg1/3Nb2/3)O3
چکیده انگلیسی

The temperature dependence of the photoluminescence spectra of the relaxor ferroelectric Pb(Mg1/3Nb2/3)O3 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 142, Issue 11, June 2007, Pages 651–654
نویسندگان
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