Fabrication of SrFe12−x Ni x O19 nanoparticles and investigation on their structural, magnetic and dielectric properties

Ghahfarokhi, S. E. Mousavi; Hosseini, Seyed Ali; Shoushtari, Morteza Zargar

doi:10.1007/s12613-015-1145-4

Cited by 14 publications

(3 citation statements)

References 18 publications

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“…where 'd' is the interplaner distance, 'hkl' are the Miller indices. 10,28,29 The crystallite size of samples was estimated by using the Williamson-Hall formula:…”

Section: Xrd Analysismentioning

confidence: 99%

Influence of nickel substitution on crystal structure and magnetic properties of strontium ferrite preparation via sol-gel auto-combustion route

Roohani

Arabi

Sarhaddi

2018

Int. J. Mod. Phys. B

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In this research, SrFe[Formula: see text]Ni[Formula: see text]O[Formula: see text] (x [Formula: see text] 0 − 1) hexagonal ferrites were prepared by sol-gel auto-combustion method. Effect of Ni substitution on structural, morphological and magnetic properties of nanoparticles was investigated by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM), respectively. The XRD results confirmed that all samples with x [Formula: see text] 0.5 have single phase M-type strontium ferrite structure, whereas for the SrFe[Formula: see text]Ni[Formula: see text]O[Formula: see text] samples with x [Formula: see text] 0.5, the spinel NiFe2O4 phase has also appeared. The lattice parameters and crystallite sizes of the powders were concluded from the XRD data and Williamson–Hall method. Magnetic analyses showed that the coercivity of powders decreased from 5672 Oe to 639 Oe while the saturation magnetization increased from 74 emu/g to 81 emu/g with nickel substitution. The results of this study suggest that the strontium hexaferrites doped with Ni are suitable for applications in high density magnetic recording media as well as microwave devices because of their promising magnetic properties.

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“…where 'd' is the interplaner distance, 'hkl' are the Miller indices. 10,28,29 The crystallite size of samples was estimated by using the Williamson-Hall formula:…”

Section: Xrd Analysismentioning

confidence: 99%

Influence of nickel substitution on crystal structure and magnetic properties of strontium ferrite preparation via sol-gel auto-combustion route

Roohani

Arabi

Sarhaddi

2018

Int. J. Mod. Phys. B

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“…For the test, the obtained mixture was molded into a ring with a 3-mm interior diameter, 7-mm exterior diameter, and 2-mm height. The electromagnetic parameters of the paraffin matrixes filled with samples were investigated by measuring relative complex permittivity, r , respectively [19]. Through a combination of network analysis and transmission line theory [20−21], electromagnetic parameters such as complex permittivity and permeability can be measured.…”

Section: Characterizationmentioning

confidence: 99%

Microwave absorption properties of SiC@SiO2@Fe3O4 hybrids in the 2–18 GHz range

Zhou

Chen

et al. 2017

Int J Miner Metall Mater

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Abstract:To enhance the microwave absorption performance of silicon carbide nanowires (SiCNWs), SiO 2 nanoshells with a thickness of approximately 2 nm and Fe 3 O 4 nanoparticles were grown on the surface of SiCNWs to form SiC@SiO 2 @Fe 3 O 4 hybrids. The microwave absorption performance of the SiC@SiO 2 @Fe 3 O 4 hybrids with different thicknesses was investigated in the frequency range from 2 to 18 GHz using a free-space antenna-based system. The results indicate that SiC@SiO 2 @Fe 3 O 4 hybrids exhibit improved microwave absorption. In particular, in the case of an SiC@SiO 2 to iron(III) acetylacetonate mass ratio of 1:3, the microwave absorption with an absorber of 2-mm thickness exhibited a minimum reflection loss of −39.58 dB at 12.24 GHz. With respect to the enhanced microwave absorption mechanism, the Fe 3 O 4 nanoparticles coated on SiC@SiO 2 nanowires are proposed to balance the permeability and permittivity of the materials, contributing to the microwave attenuation.

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“…The magnetoplumbite structure of strontium hexaferrite has 64 ions per unit cell. The distribution of ions is available in the literature [31]. In this study, Cd and Ni elements have been substituted into the SrFe 12 O 19 structure and the results of structural, magnetic, spectral, and optical properties are determined by XRD, FT-IR, Raman, FESEM, VSM, and UV-Vis-NIR analyses.…”

Section: Introductionmentioning

confidence: 99%

Elucidation of structural, optical, and magnetic properties of Cd/Ni-doped strontium hexaferrite

Jayakumar

Raja

Arumugam

2020

J Mater Sci: Mater Electron

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Cd/Ni-substituted strontium hexaferrite SrFe 12−2x Cd x Ni x O 19 (for x = 0.0, 0.1, and 0.2) has been prepared via sol-gel method. The synthesized samples have been sintered at 950 °C. Powder X-ray diffraction (XRD) results establishes the single-phase magnetoplumbite structure. Lattice parameters (a and c), cell volume (V cell ), and crystallite size (D) have been determined. The magnetic characteristics such as saturation magnetization (M s ), retentive magnetization (M r ), and coercive field (H c ) have also been determined from VSM data (hysteresis loop). The value of M s increases, and M r and H c decreases with increase in dopant concentration. FT-IR and Raman analysis establishes the metal-oxygen vibrations present in various sites. UV-Vis-NIR spectra reveals that the synthesized samples are transparent in the entire visible region and hence they can be used in optoelectronic applications. The study reveals that Cd/Ni-substituted strontium hexaferrites are suitable candidates for optoelectronic devices, microwave devices, and recording media.

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Fabrication of SrFe12−x Ni x O19 nanoparticles and investigation on their structural, magnetic and dielectric properties

Cited by 14 publications

References 18 publications

Influence of nickel substitution on crystal structure and magnetic properties of strontium ferrite preparation via sol-gel auto-combustion route

Influence of nickel substitution on crystal structure and magnetic properties of strontium ferrite preparation via sol-gel auto-combustion route

Microwave absorption properties of SiC@SiO2@Fe3O4 hybrids in the 2–18 GHz range

Elucidation of structural, optical, and magnetic properties of Cd/Ni-doped strontium hexaferrite

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