کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9829681 | 1524496 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New phase transition of erbium-doped KNbO3 polycrystalline
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Raman scattering, Stokes photoluminescence (PL) spectroscopy and differential scanning calorimetry (DSC) measurements have been used to study the phase transition of 2Â mol% erbium-doped potassium niobate (KNbO3) polycrystalline. The low-temperature Raman scattering experiments showed that the phase transition occurred at around 200 and 300Â K, and the DSC thermograms indicated that the phase transition occurred at 203, 290, 481 and 666Â K, respectively. Comparing our results with Matthias's, we proposed that 2Â mol% erbium-doped KNbO3 polycrystalline exhibits a new phase transition at 203Â K. The PL spectra intensity was also unusual during these temperatures; a strong non-exponential behavior was found. From these results of Raman scattering, DSC and PL, we concluded that the behavior of 2Â mol% erbium-doped KNbO3 polycrystalline at 203Â K should be a new phase transition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 280, Issues 1â2, 15 June 2005, Pages 179-184
Journal: Journal of Crystal Growth - Volume 280, Issues 1â2, 15 June 2005, Pages 179-184
نویسندگان
Cheng-Hung Wen, Sheng-Yuan Chu, Yung-Der Juang, Cheng-Kuo Wen,