کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8943565 | 1645163 | 2019 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of annealing on structural and magnetic properties of NiFe2O4/ZnFe2O4 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
Nanocomposites of Ni-ferrite (NF) and Zn-ferrite (ZF) were prepared by mixing them at different ratio and were subsequently annealed at different temperatures. Structural studies showed the appearance of NiZn-ferrite along with the constituent ferrites in the nanocomposite samples with the increase in annealing temperature. Magnetization value increased and the coercivity showed a peak around 750â¯Â°C with the increase in annealing temperature. Both the magnetization and coercivity decreased with the increase in ZF concentration in these samples annealed at temperatures lower than 900â¯Â°C. The highest magnetization value of 52â¯emu/g and the lowest coercivity of 40 Oe were observed at 300â¯K in the nanocomposite sample with NF:ZFâ¯=â¯3:2 and annealed at 900â¯Â°C. The observed magnetization value was higher than the expected values whereas the observed coercivity was lower than the expected values in the annealed samples. Grain growth, intergranular interactions, formation of NiZn-ferrite and cation distribution in the spinel structure explain the observed magnetic behaviour in these nanocomposites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 469, 1 January 2019, Pages 81-88
Journal: Journal of Magnetism and Magnetic Materials - Volume 469, 1 January 2019, Pages 81-88
نویسندگان
C.N. Anumol, M. Chithra, M. Govindaraj Shalini, Subasa C. Sahoo,