کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1531125 1512006 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ce3+-doped lutetium yttrium orthosilicate crystals: Structural characterization
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Ce3+-doped lutetium yttrium orthosilicate crystals: Structural characterization
چکیده انگلیسی

In this work we investigate the structural properties of Ce:Lu2(1−x)Y2xSiO5 (LYSO) crystals as a function of cerium incorporation by means of low-temperature high-resolution Raman measurements. Czochralski grown single-crystal LYSO samples were obtained with a ratio of yttrium to lutetium ions 10:90 (Ce:Lu1.8Y0.2SiO5) and a variation in the cerium concentration in the 0–750 ppm range. A red shift of the Raman bands, related to a decrease of the unit cell, is observed as function of the cerium concentration in the crystal. By analyzing the low wave number vibrational modes and the polarized Raman measurements, the substitutional role of cerium ions in the rare-earth sites occupied by yttrium ions is infrared. In addition, since the rare earth can occupy two independent different crystallographic sites, the analysis of the Raman spectra allows to distinguish the preferred site by cerium ions in the doping process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 146, Issues 1–3, 15 January 2008, Pages 2–6
نویسندگان
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