کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5351136 | 1503649 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical and ferromagnetic properties of Cr doped ZnO nanorods
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
ZnO nanorods doped with 1-2Â wt% Cr were grown on Si substrates by hydrothermal method. Scanning electron spectroscopy and X-ray diffraction show the hexagonal structure of the nanorods with ZnO oriented along (1Â 0Â 0), (0Â 0Â 2), (1Â 0Â 1) and (1Â 0Â 2) and CrO2 along (2Â 1Â 1). Ionized donor bound exciton, neutral donor bound exciton, free exciton, two-electron-satellite of hydrogen donor bound exciton, and donor acceptor pairs were observed in low temperature photoluminescence spectra. The photoluminescence spectra along with XPS results confirm that Zni was formed in the low temperature hydrothermal process. Superconducting quantum interference device measurement reveals that the Cr-doped ZnO nanorods are ferromagnetic with saturation magnetization of 2.421Â ÃÂ 10â3Â emu/g. The room temperature ferromagnetic properties are explained by defect-mediated bound magnetic polarons based on Zni.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 315, 1 October 2014, Pages 124-130
Journal: Applied Surface Science - Volume 315, 1 October 2014, Pages 124-130
نویسندگان
Bao-Zhu Lin, Lin Zhou, Sh. U. Yuldashev, De-Jun Fu, Tae-Won Kang,