کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8154040 | 1524770 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magneto-optical properties of BaCryFe12âyO19 (0.0â¯â¤â¯yâ¯â¤â¯1.0) hexaferrites
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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
In this study, nanocrystalline BaCryFe12âyO19 (0.0â¯â¤â¯yâ¯â¤â¯1.0) hexaferrite powders were prepared by sol-gel auto combustion method and the effect of Cr3+ ion substitution on morphology, structure, optic and magnetic properties of Barium hexaferrite were investigated. X-ray powder diffraction (XRD) analyses confirmed the purity of all samples. The XRD data shows that the average crystallite size lies between 60.95â¯nm and 50.10â¯nm and same was confirmed by Transmission electron microscopy. Transmission electron and scanning electron microscopy analyses presented the hexagonal morphology of all products. The characteristic hysteresis (Ï-H) curves proved the ferromagnetic feature of as grown nanoparticle samples. Specific saturation magnetization (Ïs) drops from 46.59 to 34.89â¯emu/g with increasing Cr content while the coercive field values lie between 770 and 1652â¯Oe. The large magnitude of the magnetocrystalline (intrinsic) anisotropy field, (Ha) between 11.0 and 12.6â¯kOe proves that all products are magnetically hard. The energy band gap values decrease from 2.0â¯eV to 1.84â¯eV with increasing Cr content. From 57Fe Mössbauer spectroscopy, the variation in line width, isomer shift, quadrupole splitting and hyperfine magnetic field values were determined and discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 451, 1 April 2018, Pages 463-472
Journal: Journal of Magnetism and Magnetic Materials - Volume 451, 1 April 2018, Pages 463-472
نویسندگان
S. Asiri, S. Güner, A.D. Korkmaz, Md. Amir, K.M. Batoo, M.A. Almessiere, H. Gungunes, H. Sözeri, A. Baykal,