کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1593052 1002683 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pressure induced structural stability studies on Nd2Zr2O7 pyrochlore
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Pressure induced structural stability studies on Nd2Zr2O7 pyrochlore
چکیده انگلیسی

High-pressure Raman spectroscopic investigations of Nd2Zr2O7 upto 20 GPa together with low temperature Raman and IR studies in the temperature range 300–10 K are being reported. The effect of oxygen vacancy on the structural transition of the highly ordered pyrochlore structure was established by these studies. Few subtle changes in the spectra including substantial broadening of Raman modes at 4 GPa were observed. These changes are suggestive of structural phase transition to disordered pyrochlore phase. The origin of this transition is due to the structural disorder induced by the random statistical nature of the oxygen vacancies at high pressure. The low temperature measurement on Nd2Zr2O7 indicates that the broadening of the Raman modes is not due to anharmonic vibration but due to an inherent disorder present in the system.

Research highlights
► Few minor changes in the Raman spectra at and above 4 GPa have been reported.
► Oxygen vacancy has an important role on the structural transition of the ordered pyrochlore.
► The broadening of the Raman modes is due to an inherent disorder present in the system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 151, Issue 4, February 2011, Pages 321–325
نویسندگان
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