کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5490855 | 1524782 | 2017 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Size dependent training of exchange bias effect in CuFe2O4/CuO nanocomposites
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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
Size dependent training of exchange bias effect in CuFe2O4/CuO nanocomposites has been investigated in this report. The analysis of coercive field versus cycle numbers predict two mechanisms (athermal effect and conventional thermal activation) exist in the training process. The athermal effect is concerned to result the abrupt decrease at first cycle, while the conventional thermal activation is responsible for the gradual reduction of the subsequent cycles. Size depends on relative change of exchange bias field (HEB) and enhancement of coercivity (ÎHC) show a nonmonotonic change. The decay rate of normalized HEB and ÎHC with field cycles are different, supporting dual behaviors of uncompensated spins at the interface. The frozen uncompensated antiferromagnetic spins are responsible for the HEB reduction, while the ÎHC change has correlation to the rotatable uncompensated antiferromagnetic spins at the FM/AFM interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 439, 1 October 2017, Pages 384-390
Journal: Journal of Magnetism and Magnetic Materials - Volume 439, 1 October 2017, Pages 384-390
نویسندگان
Y.X. Gao, C.M. Zhu, S. Huang, Z.M. Tian, S.L. Yuan,