Exploration through Structural, Electrical, and Magnetic Properties of Al<sup>3+</sup> Doped Ni–Zn–Co Nanospinel Ferrites

Jahan, Nusrat; Khan, Nazrul Islam; Khandaker, Jahirul Islam

doi:10.1021/acsomega.1c04832

Cited by 23 publications

(10 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The micro-strain induced by the co-substituents (Zn and Al) is the primary factor for both drop in crystallite size and lattice parameter with “ x ”. However, this trend in lattice parameter is not aligned with the reports available in the literature, − if either Zn or Al alone is considered for substitution. For instance, in Zn-substituted CFO compounds made by co-precipitation, the lattice parameter slightly increases with Zn-doping .…”

Section: Resultscontrasting

confidence: 62%

“…Here also, the increase of the lattice parameter is attributed to the difference in the ionic radii of Zn 2+ and Co 2+ . Similarly, for Al doping into CFO to produce CoFe 2– x Zn x O 4 materials, existing reports in the literature claim that the lattice parameter decreases with the Al incorporation into the lattice. , Most of the these reports attribute this lattice parameter reduction to the classical effect of size difference, where the larger Fe 3+ ion is substituted by a smaller Al 3+ ion, leading to a change in the lattice parameters. , It is widely accepted that Al 3+ incorporation inhibits the particle/crystallite growth in ferrites, − while improves resistivity and lowers dielectric losses. , Therefore, the observed decrease in the crystallite size along with lattice parameter is due to the inherent nature of the Al 3+ ions inhibiting the crystal growth and, thus, the reduced average crystallite size with increasing x in CZFAO samples. In fact, such a strong dominating effect of Al 3+ -ion incorporation-induced crystallite size and lattice parameter reduction is also seen in the complex ferrites, such as Ni–Zn–Co mixed nanospinel ferrites …”

Section: Resultsmentioning

confidence: 99%

“…In fact, such a strong dominating effect of Al 3+ -ion incorporation- induced crystallite size and lattice parameter reduction is also seen in the complex ferrites, such as Ni−Zn−Co mixed nanospinel ferrites. 46 Morphology and Microstructure. The surface morphology and microstructure of sintered CZFAO samples were examined using SEM imaging analysis.…”

Section: ■ Experimental Detailsmentioning

confidence: 99%

See 2 more Smart Citations

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

et al. 2023

View full text Add to dashboard Cite

We report on the influence of Al and Zn co-substitution on the structural, magnetic, and magnetostrictive properties of cobalt ferrite (Co1–x Zn x Fe2–x Al x O4, 0 ≤ x ≤ 0.15; CZFAO) materials, which were made using a glycine-nitrate autocombustion process. The cubic spinel structure is present in both the as-synthesized and the sintered CZFAO samples, where it was evident that the crystallite size and lattice parameter reduced with increasing x due to the incorporation of smaller Al3+ ions in place of larger Fe3+ ions in spinel ferrite. Co-substitution induced changes in the metal–oxygen bond lengths, causing both the tetrahedral and octahedral infrared and Raman spectroscopic bands to shift toward higher wavenumbers. The electron microscopy analyses indicate that the Al–Zn substitution induces grain growth, leading to a dense, interconnected grain morphology. Mossbauer analyses indicate that the Al3+ occupies the octahedral site, whereas Zn2+ is substituted at the tetrahedral site. Due to equal magnetic dilution of both tetrahedral and octahedral sites caused by the presence of Zn and Al at the appropriate sites, the saturation magnetization M S of CZFAO is the same as that of pure CFO. All other magnetic parameters (coercivity H C, magnetocrystalline anisotropy constant K 1, and Curie temperature T C) decrease with increasing x, where the decline observed is mostly due to superexchange interaction (A-O-B) reduction caused by the substituents’ non-magnetic character. CZFAO materials exhibit higher magnetostriction strain λ and strain sensitivity dλ/dH at relatively low magnetic fields; among all the samples, x = 0.15 demonstrates a maximum strain sensitivity of −2.53 × 10–9 m/A at 23 kA/m magnetic field. The composition-tuned CZFAO materials with desirable properties are suitable for application in torque sensors.

show abstract

Section: Resultscontrasting

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Detailsmentioning

confidence: 99%

See 1 more Smart Citation

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

et al. 2023

View full text Add to dashboard Cite

show abstract

“…They have unique structural and dielectric properties with respect to their bulk material, which is chemically and thermally stable. However, the high resistivity of ferrite nanoparticles greatly influences their dielectric and gas-sensing behavior. − …”

Section: Introductionmentioning

confidence: 99%

Influence of Zinc Substitution on the Structural, Dielectric, and Gas-Sensing Properties of Mg_1–xZn_xFe₂O₄ Nanoparticles

Nazir,

Javaid,

Baig

et al. 2023

ACS Omega

View full text Add to dashboard Cite

In the present work, Mg1–x Zn x Fe2O4 (MZFO) nanoparticles with x = 0.0, 0.2, 0.35, and 0.5 were synthesized via a chemical coprecipitation method. The study aimed to explore the effect of substituting Mg with Zn in MZFO on its structural, dielectric, and gas-sensing properties. The spinel phase formation was confirmed using X-ray diffraction, and the morphology of the prepared nanoparticles was revealed using scanning electron microscopy. Fourier transform infrared spectroscopy (FTIR) analysis confirmed the band ranges of 500–600 cm–1 for tetrahedral and 390–450 cm–1 for octahedral lattice sites. The dielectric data showed that Zn substitution in MZFO decreased both the dielectric constant and loss with increasing frequencies and attained a stagnant value at higher frequencies. Furthermore, the gas-sensing characteristics of Zn-substituted spinel ferrites at room temperature for CO2, O2, and N2 were studied. The nanostructured MZFO exhibited high sensitivity in the order of CO2 > O2 ≫ N2 and showed a good response time of (∼1 min) for CO2, demonstrating that MZFO can be a good potential candidate for gas-sensing applications.

show abstract

“…The increased S/V ratio in NPs leads to enhancement in various properties like thermal, electrical, mechanical, magnetic and optical characteristics in spinel ferrites. As the S/V ratio is linearly correlated to particle size and resultant, it plays a significant part in determining magneto-electric properties like anisotropy, saturation magnetization, and dielectric properties (Issa et al, 2013;Jahan et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Reitveld refinement, structural, optical band gap and low-temperature magnetic characterization of Gd3+ doped spinel cubic CoFe2O4 nanoparticles

Kumar

Gora

Kumar

et al. 2022

Bangladesh J. Sci. Ind. Res.

View full text Add to dashboard Cite

The current study unravels the structural, optical band gap and magnetic characteristics of rare-earth (RE) gadolinium (Gd) substituted CoGdxFe2-xO4 (x= 0.00 - 0.10, in the interval of 0.02) nanocrystallites synthesized by the sol-gel self-ignition route. The XRD analysis and Rietveld refinement confirmed the existence of a single cubic phase with a crystallite size of ~15-21 nm range, further confirmed by HRTEM results. SEM images confirmed the well-known nano-size morphology for all the samples. The magnetization measurements show a hard ferromagnetic nature for all specimens within the temperature range of 20-300K. Coercivity, remanent, and saturation magnetization monotonically increased with a reduction in temperature from 300K to 20K. UV-Vis absorbance results show that the band gap energy of CoFe2O4 nanoparticles (NPs) decreases with increasing Gd3+ ion doping and have band gap energy values of 2.47, 2.15, 2,02, 2.00, 1.43 and 1.95 eV for x= 0.00, 0.02, 0.04, 0.06, 0.08, 0.10, respectively in CoGdxFe2-xO4 nanoferrites. The present study reveals that structural, optical band gap and magnetic properties could be altered by monitoring the quantity of gadolinium in cobalt nanoferrites. Bangladesh J. Sci. Ind. Res. 57(3), 173-186, 2022

show abstract

Exploration through Structural, Electrical, and Magnetic Properties of Al³⁺ Doped Ni–Zn–Co Nanospinel Ferrites

Cited by 23 publications

References 46 publications

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

Influence of Zinc Substitution on the Structural, Dielectric, and Gas-Sensing Properties of Mg_1–xZn_xFe₂O₄ Nanoparticles

Reitveld refinement, structural, optical band gap and low-temperature magnetic characterization of Gd3+ doped spinel cubic CoFe2O4 nanoparticles

Contact Info

Product

Resources

About

Exploration through Structural, Electrical, and Magnetic Properties of Al3+ Doped Ni–Zn–Co Nanospinel Ferrites

Cited by 23 publications

References 46 publications

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

Influence of Zinc Substitution on the Structural, Dielectric, and Gas-Sensing Properties of Mg1–xZnxFe2O4 Nanoparticles

Reitveld refinement, structural, optical band gap and low-temperature magnetic characterization of Gd3+ doped spinel cubic CoFe2O4 nanoparticles

Contact Info

Product

Resources

About

Exploration through Structural, Electrical, and Magnetic Properties of Al³⁺ Doped Ni–Zn–Co Nanospinel Ferrites

Influence of Zinc Substitution on the Structural, Dielectric, and Gas-Sensing Properties of Mg_1–xZn_xFe₂O₄ Nanoparticles