کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1235292 968845 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fe3+ concentration dependence of photoacoustic absorption spectroscopy on ZnGa2O4 ceramic powders
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Fe3+ concentration dependence of photoacoustic absorption spectroscopy on ZnGa2O4 ceramic powders
چکیده انگلیسی

In this paper we present the photoacoustic spectroscopy of ZnGa2O4 with 5 and 10% of Fe3+. The ZnGa2O4 is a normal spinel, with Zn2+ ions in tetrahedral sites and Ga3+ ions in octahedral sites. It is expected for these hosts that Fe3+ ions occupy Ga3+ sites. Therefore, the optical properties would be associated to an octahedral symmetry. The energy levels were identified and the crystal field and electronic interaction parameters calculated with Tanabe–Sugano matrices for d5 configuration. We have also studied the dependence of the photoacoustic signal amplitude on the excitation light modulation frequency. Our results indicate that thermal expansion is the predominant phenomenon for the photoacoustic signal generation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 69, Issue 2, February 2008, Pages 338–342
نویسندگان
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