کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1606640 | 1516231 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication and low temperature magnetic studies of Ni-Co core-shell nanowires
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Core-shell magnetic nanowires of nickel and cobalt embedded in ion-track etched polycarbonate (PC) template were fabricated by two step etching and deposition technique. Structural investigations reveal the successful fabrication of 60Â nm nickel core nanowires surrounded by â¼20Â nm concentric cobalt shell. X-ray diffraction and electron microscopy studies confirmed the presence of fcc nickel and hcp cobalt at the core and shell regions, respectively. Low temperature magnetic studies performed between 5 and 300Â K indicate the ferromagnetic nature of the nanowires with coercivity and magnetization that are increasing with decreasing temperature of the nanowires. Temperature dependence of coercivity can be understood in term of thermal activation over the energy barrier with m-power dependence on the field, while the saturation magnetization was found to follow the modified Bloch's law at low temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 662, 25 March 2016, Pages 296-301
Journal: Journal of Alloys and Compounds - Volume 662, 25 March 2016, Pages 296-301
نویسندگان
K. Maaz, J.L. Duan, S. Karim, Y.H. Chen, H.J. Yao, D. Mo, Y.M. Sun, J. Liu,