Journal of Superconductivity and Novel Magnetism, ( ISI ), Volume (30), No (4), Year (2017-4) , Pages (625-634)

Title : ( M-Type Strontium Hexaferrite Nanoparticles Prepared by Sol-Gel Auto-combustion Method: The Role of Co Substitution in Structural, Morphological, and Magnetic Properties )

Authors: Hadi Arabi ,

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In this work, the sol-gel auto-combustion method has been successfully used to prepare nanocrystalline stron- tium hexaferrite doped with cobalt at iron sites (SrFe12 − x CoxO19, x = 0–1). The crystal structure, morphology, and magnetic properties of samples were systematically investi- gated using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM), respec- tively. The three vibrational modes were observed in the FT-IR spectra of calcined samples, which indicated the pres- ence of metal-oxygen stretching bands in hexaferrite struc- ture after calcination treatment. The XRD results confirmed the single-phase M-type hexagonal structure for SrFe12 − x CoxO19 samples with x ≤ 0.5; however, for the samples with x > 0.5, the cubic CoFe2O4 phase was also appeared. The average particle size etermined by TEM analysis was found to be about 87 nm (for x = 0) and 110 nm (for x = 1) whereas the cobalt ubstitution leads to the larger particles. The saturation magnetization increased with cobalt content up to x = 0.5 and then decreased slowly on further increaseof the dopant concentration, while the coercivity ecreased continuously with increasing Co content.

Keywords

, Strontium hexaferrite; Co substitution; Sol, gel auto, combustion method; Saturation magnetization;
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@article{paperid:1062124,
author = {Arabi, Hadi},
title = {M-Type Strontium Hexaferrite Nanoparticles Prepared by Sol-Gel Auto-combustion Method: The Role of Co Substitution in Structural, Morphological, and Magnetic Properties},
journal = {Journal of Superconductivity and Novel Magnetism},
year = {2017},
volume = {30},
number = {4},
month = {April},
issn = {1557-1939},
pages = {625--634},
numpages = {9},
keywords = {Strontium hexaferrite; Co substitution; Sol-gel auto-combustion method; Saturation magnetization; Coercivity},
}

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%0 Journal Article
%T M-Type Strontium Hexaferrite Nanoparticles Prepared by Sol-Gel Auto-combustion Method: The Role of Co Substitution in Structural, Morphological, and Magnetic Properties
%A Arabi, Hadi
%J Journal of Superconductivity and Novel Magnetism
%@ 1557-1939
%D 2017

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