Author
M. S. Aktar
Bio: M. S. Aktar is an academic researcher from Bangladesh Atomic Energy Commission. The author has contributed to research in topics: Rietveld refinement & Coercivity. The author has an hindex of 2, co-authored 2 publications receiving 9 citations.
Papers
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TL;DR: In this article, the formation of the single phase cubic spinel structure has been confirmed by the sharp peaks of X-ray diffraction patterns for all the samples, and the distributions of cations over the two sublattices and other crystallographic parameters have been determined precisely from the analysis of the neutron diffraction data.
10 citations
TL;DR: In this paper, a series of polycrystalline Ni-Cr ferrites, with the composition NiCr x = 0.0, 0.2 and Fe 2−x O676 4 were synthesized by conventional solid state ceramic method and the effect of Cr substitution on the structural, morphological, and magnetic properties of Ni ferrite has been investigated.
Abstract: A series of polycrystalline Ni–Cr ferrites, with the composition NiCr x
Fe 2−x
O
4 (x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0), were synthesized by conventional solid state ceramic method. The effect of Cr substitution on the structural, morphological, and magnetic properties of Ni ferrite has been investigated. Formation of single-phase cubic spinel structure of the compositions has been confirmed by X-ray diffraction. The morphological study was performed by scanning electron microscopy, and the average grain size was found to decrease with increasing Cr content. The magnetic properties of the samples were measured using an impedance analyzer and a vibrating sample magnetometer. Saturation magnetization, coercivity, and remanent magnetization have been measured from the hysteresis curves. The value of the saturation magnetization was found to decrease with increasing Cr concentration. The values of coercivity, remanent magnetization, and remanence ratio (M
r/M
s) ratio were also reported. The Curie temperatures (T
c) were determined from the plots of the real part of permeability (
$\mu _{\mathrm {i}}^{/}$
) versus temperature, and the values were found to be 511, 465, 415, 364, and 338 ∘C for x = 0.0, 0.2, 0.4, 0.6, and 0.8, respectively. The frequency dependence of the $\mu _{\mathrm {i}}^{/}$
, loss factor, and quality factor has been studied as a function of composition in the frequency range 1 kHz–120 MHz. The real part of permeability was observed to be steady up to ∼10 MHz for all the samples. The loss factor (tan δ) of the samples decreased rapidly before 40 kHz and became almost constant with low values after 40 kHz. The values of quality factor have gradually been increased for samples with x ≤ 0.4, whilst the values diminished for samples with x ≥ 0.6.
3 citations
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TL;DR: A review paper on the major researches in the field of nickel ferrites on one platform is presented in this paper, where the major research findings are tabulated and briefly summarized.
170 citations
TL;DR: CoMn2O4 microspheres with intriguing porous yolk-shell architecture have been constructed by a facile solvothermal reaction and post-calcination treatment, and were employed for the first time in the epoxidation reaction of styrene (SER).
34 citations
TL;DR: In this paper, the authors calculated the magnetocrystalline anisotropy constant based on the law of approach to saturation and showed that porosity linewidth broadening is the predominant effect of cobalt substitution in polycrystalline ferrites.
21 citations
TL;DR: In this article, the effect of Al3+ substitution on the electrical and dielectric properties of Ni0.25Cu0.20Zn0.55AlxFe2-xO4 ferrites with x ǫ = 0.05 has been reported.
20 citations
TL;DR: In this article, one-dimensional Co2Mn2O4 hollow nanofibers with a general spinel structure were constructed by electrospinning and tunning thermal-driven procedures.
13 citations