کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5489019 | 1399594 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Eu3+-site occupation in CaTiO3 perovskite material at low temperature
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Eu3+-site occupation in CaTiO3 perovskite material at low temperature Eu3+-site occupation in CaTiO3 perovskite material at low temperature](/preview/png/5489019.png)
چکیده انگلیسی
In order to clarify the site occupancy of rare-earth ions in rare-earth doped perovskite materials, the un-doped pure CaTiO3 and Eu3+-doped CaTiO3 samples with a series of Ca/Ti ratio were synthesized via high-temperature solid-state reaction method. X-ray diffraction (XRD) powder patterns confirm that the crystal structure keeps invariant at various Ca/Ti ratios. Measurement results of unit-cell parameters and X-ray photoelectron spectroscopy (XPS) indicate that Eu3+ ions enter into the Ca2+ site. The high-resolution photoluminescence spectra of Eu3+ ions at 20 K in all samples did not witness a significant change under the excitation at different wavelength, implying that Eu3+ ions occupy only one type of site. Considering the small spectral splitting range of 5D0 â 7F2 transition and the large intensity ratio of 5D0 â 7F2/5D0 â 7F1, it can be concluded that Eu3+ occupies Ca2+ site with larger coordinate numbers rather than Ti4+ site.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 17, Issue 1, January 2017, Pages 24-30
Journal: Current Applied Physics - Volume 17, Issue 1, January 2017, Pages 24-30
نویسندگان
Fengfeng Chi, Yanguang Qin, Shaoshuai Zhou, Xiantao Wei, Yonghu Chen, Changkui Duan, Min Yin,