کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11026309 | 1666395 | 2019 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cation distribution, magnetic and structural properties of CoCrxFe2-xO4: Effect of calcination temperature and chromium substitution
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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
The influence of chromium doping and the calcination temperature on the structural, morphological, cation distribution and magnetic properties of CoCrxFe2âxO4 where xâ¯=â¯0.0, 0.25, 0.5, 0.75 and 1 were investigated in detail. The X-ray diffraction (XRD) analysis using the Rietveld refinement technique proved the nanocrystalline single-phase, chromium doped cobalt ferrite samples. It is observed that the lattice parameter 'a' decreases with increasing the chromium concentrations, while lattice parameter gradually enhances with increasing of calcination temperature. The cation distribution was inferred from the analysis of intensity of XRD as well magnetic properties. Magnetic measurements informed that both of the coercivity (HC) and saturation magnetization (MS) overall decrease with increasing chromium substitution. Also, with rising of calcination temperature from 350 to 1000â¯Â°C, for un-doped cobalt ferrite sample, MS is increased from 31 to78â¯emu/gr, respectively. These magnetic behaviors could be explained by the cation distribution and crystallite size enhancement. The HC enhancement for the heat-treated samples until 700â¯Â°C can be attributed to the crystal growth within the single domain region, while decreasing HC by further increasing calcination temperature to 1000â¯Â°C, is due to the transformation of single domain nanoparticles to multi-domain particles. The reduced hysteresis loops due to decreasing MS and HC with increase in chromium concentration, which in turn lowered the coercive field and softened the material, favoring its application in high-frequency transformers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 471, 1 February 2019, Pages 294-303
Journal: Journal of Magnetism and Magnetic Materials - Volume 471, 1 February 2019, Pages 294-303
نویسندگان
Hossein Nikmanesh, Mahin Eshraghi, Shiva karimi,