Structural, electrical, optical and dielectric properties of yttrium substituted cadmium ferrites prepared by Co-Precipitation method

Amin, Nasir; Hasan, M.S.; Majeed, Zahid; Latif, Zartashia; Nabi, M. Ajaz un; Mahmood, K.; Ali, Adnan; Mehmood, Kiran; Fatima, Muneeba; Akhtar, Maria; Arshad, Muhammad; Bibi, Aisha; Iqbal, Muhammad Zahir; Jabeen, Farukh; Bano, Nargis

doi:10.1016/j.ceramint.2020.05.079

Cited by 67 publications

(46 citation statements)

References 41 publications

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“…The smaller amount of RE cations getting substituted in the sublattice and larger RE cations diffuse in the grain boundaries [36]. The crystallite size 'D' was calculated via the Scherrer's equation [37,38]. It is noted that crystallite size decreased with increasing La 3+ concentration (x) except at x = 0.0375, which is in good agreement with the literature [31].…”

Section: It Is Observed In Table 1 That Experimental Lattice Constant (supporting

confidence: 80%

Controllable synthesis of La3+ doped Zn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
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0.5 0.25 0.25 2− 4 (x = 0.0, 0.0125, 0.025, 0.0375, 0.05) ferrite powders with uniform distribution of ions and close-packed configuration were prepared via sol-gel autocombustion route. XRD spectra showed the formation of spinel-phase cubic crystalline structure. SEM results revealed that the irregularity in size and shape of particles increases, and particle distribution uniformity decreases with La 3+ concentration. Moreover, each curve of the UV-vis spectra revealed two optical energy band gaps. More importantly, DC resistivity (ρ) and the activation energy (∆ ) have minimum values at x=0.0375. The dielectric loss was explained according to Maxwell-Wager space charge polarization. The P-E loop showed the ferroelectric nature of the synthesized samples. Moreover, VSM results revealed that the as-prepared samples possessed maximum saturation magnetization (MS = 56.77 ± 0.0283) and 8-12 GHz operating microwave frequency (ωm) range at x = 0.0375. All these results show the potential of 0.5 0.25 0.25 1.9625 0.0375 4 ferrite powders for X-band microwave applications. Highlights• Zn0.5Co0.25Cu0.25Fe2-xLaxO4 ferrite powders via simple sol-gel auto-combustion.• Crystallite size and lattice constant decrease with increasing La 3+ cations • Optical band gap energies and DC resistivity have minimum values at x=0.0375.• The ferroelectric nature of all the samples was confirmed using the P-E loop.• Maximum magnetization saturation was observed at x = 0.0375.

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Section: It Is Observed In Table 1 That Experimental Lattice Constant (supporting

confidence: 80%

Controllable synthesis of La3+ doped Zn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
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“…The predicted specific surface area using the developed GBSVR model agree excellently well with the measured values [5] 7 presents the effect of yttrium nanoparticles incorporation on specific surface area of doped Cd 1-x Y x Fe 2 O 4 spinel ferrite nanomaterial using the developed GBSVR model. Comparison of the measured specific surface area with the estimated values using the developed GBSVR model as presented in Figure 7 shows excellent agreement [52]. The observed variation of specific surface area due to yttrium incorporation can be inferred from the fact that substitution with higher ionic radius creates spaces in the configurations of spinel ferrite material.…”

Section: Sensitivity and Convergence Of The Developed Hybridmentioning

confidence: 54%

“…The model also factors in the size of nanomaterial as its descriptor for estimating the specific surface area of spinel ferrite nanomaterial. The lattice distortion and the size of the nanomaterials with their corresponding specific surface area for forty spinel ferrite nanomaterials doped with different nanoparticles are extracted from the literature for the model development [5,7,8,18,[51][52][53][54][55]. The lattice strain as well as structural distortion in lattice structure of the parent spinel ferrite nanomaterial resulted from the introduced dopants definitely alters the material specific surface area.…”

Section: Acquisition and Description Of Spinel Ferritementioning

confidence: 99%

Modeling the Specific Surface Area of Doped Spinel Ferrite Nanomaterials Using Hybrid Intelligent Computational Method

Owolabi

Saleh

Olubosede

et al. 2021

Journal of Nanomaterials

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Spinel ferrites nanomaterials are magnetic semiconductors with excellent chemical, magnetic, electrical, and optical properties which have rendered the materials useful in many technological driven applications such as solar hydrogen production, data storage, magnetic sensing, converters, inductors, spintronics, and catalysts. The surface area of these nanomaterials contributes significantly to their targeted applications as well as the observed physical and chemical features. Experimental doping has shown a great potential in enhancing and tuning the specific surface area of spinel ferrite nanomaterials while the attributed experimental challenges call for viable theoretical model that can estimate the surface area of doped spinel ferrite nanomaterials with high degree of precision. This work develops stepwise regression (STWR) and hybrid genetic algorithm-based support vector regression (GBSVR) intelligent model for estimating specific surface area of doped spinel ferrite nanomaterials using lattice parameter and the size of nanoparticle as descriptors to the models. The developed hybrid GBSVR model performs better than STWR model with the performance improvement of 7.51% and 22.68%, respectively, using correlation coefficient and root mean square error as performance metrics when validated with experimentally measured specific surface area of doped spinel ferrite nanomaterials. The developed GBSVR model investigates the influence of nickel, yttrium, and lanthanum nanoparticles on the specific surface area of different classes of spinel ferrite nanomaterials, and the obtained results agree excellently well with the measured values. The accuracy and precision characterizing the developed model would be of immense importance in enhancing specific surface area of doped spinel ferrite nanomaterial prediction with circumvention of experimental stress coupled with reduced cost.

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“…XRD pattern confirmed that cobalt is effectively inserted into the spinel structure. By using Scherrer’s relation, the average crystallite size ( D ) was determined as [ 9 ]:

where λ and β indicate wavelength (1.542 Å) and full width at half maximum (FWHM) of peaks, respectively. Bragg’s law was used to investigate inter planer spacing or distance between crystal planes ( d ) as [ 10 ],

where n = 1 is the order of reflection for cubic structure and θ is the diffraction angle obtained from the XRD pattern.…”

Section: Resultsmentioning

confidence: 99%

Structural, Optical and Electrical Properties of Cu0.6CoxZn0.4−xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4) Soft Ferrites

et al. 2021

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A series of cobalt-inserted copper zinc ferrites, Cu0.6CoxZn0.4−xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4) having cubic spinel structure were prepared by the coprecipitation method. Various characterization techniques, including XRD, FTIR, UV-vis and I–V were used to investigate structural optical and electrical properties, respectively. The lattice constant was observed to be decreased as smaller ionic radii Co2+ (0.74 Å) replaced the higher ionic radii Zn2+ (0.82 Å). The presence of tetrahedral and octahedral bands was confirmed by FTIR spectra. Optical bandgap energy was determined in the range of 4.44–2.05 eV for x = 0.0 to 0.4 nanoferrites, respectively. DC electrical resistivity was measured and showed an increasing trend (5.42 × 108 to 6.48 × 108 Ω·cm) with the addition of cobalt contents as cobalt is more conductive than zinc. The range of DC electrical resistivity (108 ohm-cm) makes these nanomaterials potential candidates for telecommunication devices.

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Structural, electrical, optical and dielectric properties of yttrium substituted cadmium ferrites prepared by Co-Precipitation method

Cited by 67 publications

References 41 publications

Controllable synthesis of La3+ doped Zn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
Self Cite
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Controllable synthesis of La3+ doped Zn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
Self Cite
43
1
4
0
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Modeling the Specific Surface Area of Doped Spinel Ferrite Nanomaterials Using Hybrid Intelligent Computational Method

Structural, Optical and Electrical Properties of Cu0.6CoxZn0.4−xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4) Soft Ferrites

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Structural, electrical, optical and dielectric properties of yttrium substituted cadmium ferrites prepared by Co-Precipitation method

Cited by 67 publications

References 41 publications

Controllable synthesis of La3+ doped Zn0.5Co0.25Cu0.25Fe2−xLRehman1, Morley2, Amin3 et al. 2020Ceramics InternationalSelf Cite43140View full textAdd to dashboardCite

Controllable synthesis of La3+ doped Zn0.5Co0.25Cu0.25Fe2−xLRehman1, Morley2, Amin3 et al. 2020Ceramics InternationalSelf Cite43140View full textAdd to dashboardCite

Modeling the Specific Surface Area of Doped Spinel Ferrite Nanomaterials Using Hybrid Intelligent Computational Method

Structural, Optical and Electrical Properties of Cu0.6CoxZn0.4−xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4) Soft Ferrites

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Controllable synthesis of La3+ doped Zn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
Self Cite
43
1
4
0
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Controllable synthesis of La3+ doped Zn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
Self Cite
43
1
4
0
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