کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10564448 | 970753 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Infrared-spectroscopic study of orthorhombic YF3 and LuF3 single crystals
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Infrared-spectroscopic study of orthorhombic YF3 and LuF3 single crystals Infrared-spectroscopic study of orthorhombic YF3 and LuF3 single crystals](/preview/png/10564448.png)
چکیده انگلیسی
Polarized infrared-reflectivity spectra have been obtained for Czochralski-grown YF3 and LuF3 single crystals, at room temperature. At this temperature these crystals exhibit an orthorhombic symmetry belonging to the Pnma (D2h16) space group, known as β-YF3. The measured spectra were analyzed based on the factor-group method and on the fitting with the four-parameter semi-quantum model. The observed modes obey well the selection rules and the 16 predicted infrared-active modes could be depicted and assigned to their corresponding symmetries for both crystals. From the frequency splitting of TOLO modes, the ionic effective charges were calculated and the results used to discuss the potentiality of laser action of β-YF3-type crystals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 39, Issue 2, 31 October 2005, Pages 244-248
Journal: Vibrational Spectroscopy - Volume 39, Issue 2, 31 October 2005, Pages 244-248
نویسندگان
M.M. Lage, K. Krambrock, R.L. Moreira, J.-Y. Gesland,