کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9834271 | 1524908 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic properties of Co-Cu nanoparticles dispersed in silica matrix
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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
The magnetic properties of Co-Cu/silica nanocomposites prepared by sequential ion implantation have been investigated. The nanostructure is formed of 4Â nm average size particles dispersed in silica matrix and with mainly FCC structure. The hysteresis loops at 3Â K indicate that the nanoparticles have uniaxial anisotropy with values smaller than that of single Cobalt implants. The samples are characterized by a superparamagnetic behavior with blocking temperatures that depend on the Co/Cu implanted ratio, and the blocking temperature distributions are narrower than those obtained by taking into account only the particle size distribution. Results are discussed considering size effects and that the nanoparticles are formed of a Co-Cu solid solution or only of Co.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volumes 290â291, Part 1, April 2005, Pages 187-190
Journal: Journal of Magnetism and Magnetic Materials - Volumes 290â291, Part 1, April 2005, Pages 187-190
نویسندگان
C. de Julián Fernández, G. Mattei, C. Maurizio, E. Cattaruzza, S. Padovani, G. Battaglin, F. Gonella, F. D'Acapito, P. Mazzoldi,