کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9804053 | 1516477 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The high temperature phase transitions of orthorhombic La0.95MnO3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The high temperature phase transitions of orthorhombic La0.95MnO3 from room temperature to 1273Â K were studied using high temperature XRD technique in air. Two-phase transitions were found in temperature ranges, 373-473Â K and 973-1273Â K, respectively. The crystal symmetry increases from orthorhombic to rhombohedral then cubic, while the second transition was not completed in the observation of the present study. The first transition could be due to the depression of Jahn-Teller distortion, while the second one could be caused by the ionic oscillation at high temperature. The lattice thermal expansion coefficients of rhombohedral La0.95MnO3 from 473 to 973Â K were also calculated using lattice parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 390, Issues 1â2, 22 March 2005, Pages 240-244
Journal: Journal of Alloys and Compounds - Volume 390, Issues 1â2, 22 March 2005, Pages 240-244
نویسندگان
Q. Shu, J. Zhang, J. Liu,