کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5442935 1510771 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The nature of Mn4+ luminescence in the orthorhombic perovskite, GdAlO3
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
The nature of Mn4+ luminescence in the orthorhombic perovskite, GdAlO3
چکیده انگلیسی
In this paper we report on the spectroscopic properties of Mn4+ (3d3) ion in the orthorhombic perovskite, GdAlO3 and calculate the energy levels using the exchange charge model of crystal-field theory. The calculated Mn4+ energy levels are in good agreement with the experimental data. The results of our calculations yield the crystal-field splitting and Racah parameters of Dq = 2083 cm−1, B = 780 cm−1 and C = 2864 cm−1, with C/B = 3.67. The emission spectrum is composed of the zero phonon line (2Eg → 4A2g transition) with dominating intensity and its vibrational sidebands. We have also calculated Mulliken atomic charges and bond populations for three isostructural perovskites (GdAlO3, LaGaO3 and CaZrO3) to seek correlation between the energy position of the Mn4+2E level and the covalence of Mn4+O2- chemical bonding.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 63, January 2017, Pages 207-212
نویسندگان
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