Mössbauer Studies and Magnetic Properties of Cubic CuFe2O4 Nanoparticles

Amir, Muhammad; Güngüneş, H.; Slimani, Y.; Tashkandi, N.; Sayed, H.S. El; Aldakheel, F.; Sertkol, M.; Sözeri, H.; Manikandan, A.; Ercan, I.; Baykal, A.

doi:10.1007/s10948-018-4733-5

Cited by 83 publications

(19 citation statements)

References 41 publications

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“…It is displayed wide hysteretic behaviour curves (large coercivity H c ) which distinguish the hard magnetic materials [35,36]. The saturation magnetization values (M s ) are estimated from the approximation of Stoner-Wohlfarth (S-W) using the following equation [37]:…”

Section: Resultsmentioning

confidence: 99%

Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe_12-xHg_xO₁₉Hexaferrite Nanoparticles Prepared by Co-Precipitation Method

Barakat

Bakeer

Sakr

2020

Journal of Taibah University for Science

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Barium hexaferrite nanoparticles are synthesized through co-precipitation technique at different annealing temperature. Series of BaFe 12−x Hg x O 19 nanoparticles, 0.00 ≤ x ≤ 0.30, are prepared under the best verified conditions (annealed at 1000°C) to investigate the effect of partial substitution of Hg 2+ ions on the physical properties of BaFe 12 O 19 nanoparticles. The hysteresis loops at room temperature show the behavior of hard ferromagnetic. The estimated values of saturation magnetization M s , remnant magnetization M r and magnetic moment m B rise as Hg 2+ ions content increases till x = 0.10, beyond which they reduce. A reverse trend is obtained for intrinsic coercivity Hi and coercivity Hc versus Hg 2+ ions content. BaFe 12−x Hg x O 19 nanoparticles are investigated through the measurements of electron paramagnetic resonance (EPR). The calculated EPR parameters show an enhancement for BaFe 12−x Hg x O 19 nanoparticles up to x = 0.10. The obtained results reveal that samples under investigation can be suitable candidate for different industrial applications.

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Section: Resultsmentioning

confidence: 99%

Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe_12-xHg_xO₁₉Hexaferrite Nanoparticles Prepared by Co-Precipitation Method

Barakat

Bakeer

Sakr

2020

Journal of Taibah University for Science

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“…The lower M s and M r magnitudes, in comparison to that of the bulk samples, were largely attributed to the smaller crystallite size, which leads to a structural disorder on the surface since the spin disorder will be significant when the volume and surface ratio are important [41]. Spin canting as a result of antiferromagnetic interaction competition, the construction of a magnetic inactive layer, the non-collinear arrangement of the magnetic moments of Fe 3+ ions, and the disordered cations distributions on the surface could all explain the lowered magnetization magnitudes [42,43].…”

Section: Resultsmentioning

confidence: 99%

Effect of Nb3+ Substitution on the Structural, Magnetic, and Optical Properties of Co0.5Ni0.5Fe2O4 Nanoparticles

et al. 2019

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Co0.5Ni0.5NbxFe2−xO4 (0.00 ≤ x ≤ 0.10) nanoparticles (NPs) were prepared using the hydrothermal approach. The X-ray powder diffraction (XRD) pattern confirmed the formation of single-phase spinel ferrite. The crystallite size was found to range from 18 to 26 nm. The lattice parameters were found to increase with greater Niobium ion (Nb3+) concentration, caused by the variance in the ionic radii between the Nb3+ and Fe3+. Fourier transform infrared analysis also proved the existence of the spinal ferrite phase. The percent diffuse reflectance (%DR) analysis showed that the value of the band gap increased with growing Nb3+ content. Scanning electron microscopy and transmission electron microscopy revealed the cubic morphology. The magnetization analyses at both room (300 K, RT) and low (10 K) temperatures exhibited their ferromagnetic nature. The results showed that the Nb3+ substitution affected the magnetization data. We found that Saturation magnetization (Ms), Remanence (Mr), and the Magnetic moment ( n B ) decreased with increasing Nb3+. The squareness ratio (SQR) values at RT were found to be smaller than 0.5, which postulate a single domain nature with uniaxial anisotropy for all produced ferrites. However, different samples exhibited SQRs within 0.70 to 0.85 at 10 K, which suggests a magnetic multi-domain with cubic anisotropy at a low temperature. The obtained magnetic results were investigated in detail in relation to the structural and microstructural properties.

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“…Where M is the molecular weight, NA is Avogadro's constant (6.022 × 10 23 mol −1 ), and "a" is the lattice constant. The theoretical density was calculated using the following formula [35][36][37][38]:…”

Section: Structural Propertiesmentioning

confidence: 99%

Structural, Dielectric and Electrical Properties of Sol-Gel Auto-Combustion Technic of CuFeCr0.5Ni0.5O4 Ferrite

Rejeiba¹,

Hcini²,

Nasri³

et al. 2021

Preprint

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The CuFeCr0.5Ni0.5O4 (CFO) compound was synthesized using sol-gel reaction combustion technic. The structural analysis showed that the obtained composites have a polycrystalline nature and the cubic spinel structure ( space group). Microstructural analysis revealed the formation of spherical and elongated grains of our sample. The dielectric and electrical transport properties of CuFeCr0.5Ni0.5O4 were investigated in detail by Ac impedance spectroscopy in a wide range of temperature (200 K-400 K) and frequency (100Hz to100KHz). Our results show that the electrical modulus and impedance studies confirm the presence of a relaxation phenomenon with non-Debye type in the prepared sample. The activation energy Edc estimated from the slope of the linear fit plot is equal to 0.158 eV with frequency of 100Hz and 0.126 eV with frequency of 1MHz at temperature range 200K-400K. Close activation energies values were found from analyzes of relaxation time and dc-conductivity indicating that the relaxation and the conduction processes may be attributed to the presence of free carrier charges and impurities at the grain boundaries. The conduction process for samples is described by the NSPT model. The complex impedance analyses and modulus formalism confirm a grain and grain boundary mechanism contributing to the dielectric properties. The real and the imaginary parts of the impedance are well ﬁtted to equivalent electrical circuit (Rg+ Rgb//CPEgb) was used for modeling the Nyquist data.

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Mössbauer Studies and Magnetic Properties of Cubic CuFe2O4 Nanoparticles

Cited by 83 publications

References 41 publications

Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe_12-xHg_xO₁₉Hexaferrite Nanoparticles Prepared by Co-Precipitation Method

Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe_12-xHg_xO₁₉Hexaferrite Nanoparticles Prepared by Co-Precipitation Method

Effect of Nb3+ Substitution on the Structural, Magnetic, and Optical Properties of Co0.5Ni0.5Fe2O4 Nanoparticles

Structural, Dielectric and Electrical Properties of Sol-Gel Auto-Combustion Technic of CuFeCr0.5Ni0.5O4 Ferrite

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Mössbauer Studies and Magnetic Properties of Cubic CuFe2O4 Nanoparticles

Cited by 83 publications

References 41 publications

Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe12-xHgxO19Hexaferrite Nanoparticles Prepared by Co-Precipitation Method

Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe12-xHgxO19Hexaferrite Nanoparticles Prepared by Co-Precipitation Method

Effect of Nb3+ Substitution on the Structural, Magnetic, and Optical Properties of Co0.5Ni0.5Fe2O4 Nanoparticles

Structural, Dielectric and Electrical Properties of Sol-Gel Auto-Combustion Technic of CuFeCr0.5Ni0.5O4 Ferrite

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Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe_12-xHg_xO₁₉Hexaferrite Nanoparticles Prepared by Co-Precipitation Method

Structural, Magnetic Properties and Electron Paramagnetic Resonance for BaFe_12-xHg_xO₁₉Hexaferrite Nanoparticles Prepared by Co-Precipitation Method