کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8156959 | 1524859 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ferromagnetic spin-order in p-type N-doped SnO2 films prepared by thermal oxidation of SnNx
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
N-doped SnO2 films were synthesized by oxidative annealing of sputtered SnNx films with various temperatures. The content of the residual N in SnO2:N films decreases with the increase of temperature. N atom is incorporated well at the O lattice site and red-shifts the band-gap by the formation of impurity bands. All the films show p-type conduction and the highest hole concentration is 2.08Ã1019 cmâ3 in the sample obtained at 400 °C, indicating an effective way to alleviate the self-compensation effect by thermal oxidation. The substituted incorporation of N can also enhance the ferromagnetism and the largest saturation magnetization is 10.1 emu/cm3. Theoretical calculations based on the density-functional theory suggest that the ferromagnetism is most likely due to the double exchange mechanism through the p-p interaction. Meanwhile, the ferromagnetic coupling competes with antiferromagnetic coupling as the N-N distance changes, causing the nonmonotonic variation of saturation magnetization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 362, August 2014, Pages 14-19
Journal: Journal of Magnetism and Magnetic Materials - Volume 362, August 2014, Pages 14-19
نویسندگان
Baozeng Zhou, Shengjie Dong, Hui Zhao, Yanyu Liu, Ping Wu,