کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9829472 | 1524492 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the deposition of Cr3âδO4 spinel particles upon laser-heated pedestal growth of Cr:YAG fiber
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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
The microstructures of Cr4+:YAG crystal fibers grown along [1 1 1] direction by laser-heated pedestal growth method were studied by optical and analytical electron microscopy. Curved growth ledges were found on the round side surface of the fiber grown at a relatively high speed. In contrast, nonepitaxial Cr3âδO4 crystallites with spinel-type structure were formed on the {1 1 2} side surfaces, via an intermediate surface melt, when the fibers were grown at a lower speed. The deposition of Cr3âδO4, rather than segregation of Cr and Ca codopants, as of concern to the Cr4+ fluorescence, can be rationalized by a high crystal field stabilization of octahedrally coordinated Cr3+ attained in rather refractory and close packed oxide.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 282, Issues 3â4, 1 September 2005, Pages 343-352
Journal: Journal of Crystal Growth - Volume 282, Issues 3â4, 1 September 2005, Pages 343-352
نویسندگان
J.Y. Ji, P. Shen, J.C. Chen, F.J. Kao, S.L. Huang, C.Y. Lo,