کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5459958 1516190 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ferrimagnetic Ni2+ doped Mg-Zn spinel ferrite nanoparticles for high density information storage
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Ferrimagnetic Ni2+ doped Mg-Zn spinel ferrite nanoparticles for high density information storage
چکیده انگلیسی
In the present paper, Ni2+ doped Mg0.5Zn0.5−xNixFe2O4 (x = 0, 0.125, 0.250, 0.375, 0.500) ferrite samples prepared by co-precipitation route have been characterized by XRD, FT-IR, FE-SEM, VSM, UV Visible and PL spectroscopy for various physical properties. A transition from superparamagnetic behavior (x = 0) to soft ferrimagnetic nature (x > 0) with Ni2+ addition has been reported. With reduction in crystallite size, ferrite nano-particles have shown an increase in coercivity with lower saturation magnetization. An increase in remanence ratio with Ni2+content has been observed. The optical band gap of the prepared samples has been calculated using Tauc plots and have been found to increase with increase in Ni2+content from 4.50 eV (x = 0) to 5.60 eV (x = 0.500). The PL spectra show band edge emission at lower energy than optical band gap energy for all samples. A cation distribution has been proposed and based on this some theoretical parameters have been calculated which supports our experimental results. Modest values of coercivity and saturation magnetization indicates that these materials may be used in high density information storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 704, 15 May 2017, Pages 7-17
نویسندگان
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