کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8156362 | 1524847 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic couplings in CoFe2O4/FeCo-FeO core-shell nanoparticles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
CoFe2O4/FeCo-FeO core-shell nanoparticles with an average particle size of about 4.3Â nm were prepared by reducing nanoparticles of superparamagnetic cobalt-ferrite under hydrogen and oxygen atmospheres. The low temperature magnetic hysteresis showed an interesting behavior which has only been observed in thin film multilayer systems. At low magnetic fields H(<0.2kOe) the behavior is dominated by the magnetic structure of the magnetically soft shell while for higher values of H the exchange-spring core-shell coupling plays a major role. A particle model which is coherent with the observed magnetic behavior has been also proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 374, 15 January 2015, Pages 192-196
Journal: Journal of Magnetism and Magnetic Materials - Volume 374, 15 January 2015, Pages 192-196
نویسندگان
J.M. Soares, O.L.A. Conceição, F.L.A. Machado, A. Prakash, S. Radha, A.K. Nigam,