کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1332242 1500114 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pressure-induced amorphization of La1/3TaO3
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Pressure-induced amorphization of La1/3TaO3
چکیده انگلیسی


• La1/3TaO3 has been studied under pressure by synchrotron XRD and Raman spectroscopy.
• La1/3TaO3 undergoes irreversible pressure induced amorphization around 18.5 GPa.
• The transition is manifested in both XRD and Raman measurements.
• A linear P–V relation is observed from ambient pressure up to the phase transition.

La1/3TaO3, an A-site cation deficient perovskite, has been studied under pressure by synchrotron X-ray powder diffraction and Raman spectroscopy. It undergoes irreversible pressure induced amorphization at P=18.5 GPa. An almost linear unit cell volume decrease vs. pressure is observed from ambient pressure up to the phase transition. The Raman spectroscopy also shows amorphization at the same pressure, with positive shifts of all modes as a function of pressure. The pressure dependence of the Eg and A1g Raman modes arising from the octahedral oxygen network is discussed.

La1/3Tao3 exhibits linear pressure–volume relation until irreversible pressure induced amorphization at 18.5 Gpa.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 202, June 2013, Pages 38–42
نویسندگان
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