کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10710217 | 1024628 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
TEM-characterization of magnetic samarium- and cobalt-rich-nanocrystals formed in hexagonal SiC
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Using analytical transmission electron microscopy techniques, nanocrystals embedded in 4H-SiC are studied which formed after high dose samarium (Sm), cobalt (Co), and Sm-and-Co-ion implantations and annealing. SmSi2, Sm5C2, Co2Si and SmCo-rich nanocrystals have been identified in terms of their crystallography, shape, strain, size, and orientation relationship to the matrix. It is shown, moreover, that cluster creations of foreign atoms (nanocrystals) and of vacancies (voids) are connected and their sizes increase with implantation dose. Carbon onions surrounding the nanocrystals have been found and this carbon excess has been interpreted as a consequence of preferred formation of foreign atom-silicide nanocrystals. For the case of Co implanted 4H-SiC, Lorentz microscopy has been applied revealing both non-magnetic and single-domain ferromagnetic nanocrystals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 293, Issue 3, June 2005, Pages 924-937
Journal: Journal of Magnetism and Magnetic Materials - Volume 293, Issue 3, June 2005, Pages 924-937
نویسندگان
Johannes Biskupek, Ute Kaiser, Hannes Lichte, Andreas Lenk, Thomas Gemming, Gunnar Pasold, Wolfgang Witthuhn,