کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8152793 | 1524759 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparative study of the structural and magnetic properties of alpha and beta phases of lithium ferrite nanoparticles synthesized by solution combustion method
ترجمه فارسی عنوان
بررسی مقایسه ای خواص ساختاری و مغناطیسی فازهای آلفا و بتا نانوذرات فریت لیتیوم سنتز شده با روش احتراق محلول
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
چکیده انگلیسی
The structural and magnetic properties of lithium ferrite nanoparticles synthesized through the solution combustion route at different fuel to oxidizer ratio are studied using different techniques. Powder X-ray diffraction studies show that the fuel to oxidizer ratio is a critical parameter that determines the phase purity and degree of order of the samples. Magnetic studies show that the saturation magnetization and coercivity are comparable to those reported for lithium ferrites prepared using other methods. Saturation magnetization of Li0.8 sample at room temperature is 60â¯emu/g and is close to the bulk value. The hyperfine parameters obtained from the Mössbauer spectra of Li0.6 and Li0.8 also match the reported values of phase pure samples. Mössbauer spectra of samples prepared at stoichiometric and fuel rich conditions show the presence of Fe2+ cations in the ferrite phase, indicating that a reducing environment which reduces Fe3+ to Fe2+ ions is created as the fuel to oxidizer ratio is increased. The variation in the structural and magnetic properties of the samples, combined with TGA and FTIR studies, shows that the fuel lean condition is more appropriate for the direct formation of single phase lithium ferrite nanoparticles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 462, 15 September 2018, Pages 136-143
Journal: Journal of Magnetism and Magnetic Materials - Volume 462, 15 September 2018, Pages 136-143
نویسندگان
Nygil Thomas, Thooneri Shimna, P.V. Jithin, V.D. Sudheesh, Harish Kumar Choudhary, Balaram Sahoo, Swapna S. Nair, N. Lakshmi, Varkey Sebastian,