Study of Electrical Transport Properties of Cadmium-Doped Zn–Mn Soft Ferrites by Co-precipitation Method

Nabi, M. Ajaz un; Moin, M. D.; Hasan, M.S.; Arshad, M. Imran; Bibi, Aisha; Amin, Nasir; Mahmood, K.; Ali, Shafaqat

doi:10.1007/s10948-020-05588-x

Cited by 26 publications

(11 citation statements)

References 28 publications

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“…The calculated values of remain the same but increased by increasing La 3+ concentration (x), which confirmed that La 3+ cations occupied the octahedral site. The value of the theoretical lattice constant [52,53] are listed in Table 6 and revealed that by raising the of La 3+ cations, the theoretical lattice constant increased. By comparing the values, it was found there is a difference between the experimental and theoretical lattice constants, this difference is because at high concentration, there is less solubility of La 3+ ions, and the LaFeO3 compound formed.…”

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

confidence: 99%

Controllable synthesis of La3+ dopedZn0.5Co0.25Cu0.25Fe2−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 (mentioning

confidence: 99%

Controllable synthesis of La3+ dopedZn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
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“…As the doping of Co 2+ increased, the porosity percentage of the ferrite reduced from 17.17 % to 13.73 %. The formation of the orthorhombic LaFeO3 phase has filled the inter-granular voids, resulting in increased density [28]. Hence, the addition of the Co 2+ ion is predicted to have a decreasing effect on porosity and as depicted in Fig.…”

Section: X-ray Diffraction (Xrd) Studymentioning

confidence: 98%

“…The unit cell volume (V) decreased from 586.15 Å to 575.43 Å. The hopping lengths LA and LB were calculated for the sublattices A-and B-sites using the following equations [28];…”

Section: X-ray Diffraction (Xrd) Studymentioning

confidence: 99%

Impact of Co2+ on the spectral, optoelectrical, and dielectric properties of Mg0.25Ni0.25Cu0.5−xCoxFe1.97La0.03O4 ferrites prepared via sol–gel auto-combustion route

Abbas

Rehman

Gull

et al. 2022

J Sol-Gel Sci Technol

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Spinel ferrites are attaining huge importance in the modern era, due to their incredible properties, which means they are widely used in various fields. Therefore, in this paper a costeffective and environmentally friendly preparation of 𝑀𝑔 0.25 𝑁𝑖 0.25 𝐶𝑢 0.5−𝑥 𝐶𝑜 𝑥 𝐹𝑒 1.97 𝐿𝑎 0.03 𝑂 4 (x = 0.0, 0.125, 0.25, 0.375, and 0.5) ferrites via the sol-gel auto-combustion method were carried out. How the structural and functional properties varied with the Cu to Co ratio was studied. It was found that the crystallite size (D) was reduced from 47.2 to 27.6 nm as the Co 2+ increased from x = 0.0 to 0.5. While the two major absorption bands including the higher frequency band (υ1) and lower frequency band (υ2) lie in the range of 573.80 -538.65 cm -1 and 470.37 -405.65 cm -1 belong to the spinel matrix. Five active Raman modes were found in the range of wave number 200 -800 cm -1 corresponds to the sublattices of the spinel structure.The optical bandgap increased from 0.85 eV to 1.33 eV for x = 0.0 to x = 0.25 and then observed optical band gap was 1.15 eV and 1.46 eV for x = 0.375 to x = 0.5. The resistivity (ρ) was minimum for Co 2+ concentration x = 0.25 at low temperature, while at high temperature the resistivity (ρ) was maximum for Co 2+ doping x = 0.25. The temperature coefficient of resistance percentage (TCR %) was −2.66%/K at 513 K for x = 0.25, as shown in the graphical abstract.At lower frequencies, the impedance was observed maximum for Co 2+ doping x = 0.125 and minimum for x = 0.375. These findings indicate that the as-prepared ferrites are a potential candidate for optoelectrical and bolometric devices.

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“…LA is the distance between cation and oxygen ion at tetrahedral site while LB is the distance between cation and oxygen ion at octahedral site. The calculated values of LA and LB are reported in Fe 2+/3+ ions prefer both A-site (tetrahedral) and B-site (octahedral) while Cd 2+ ions prefer only tetrahedral sites [32][33][34][35][36]. The cation distribution of the as-prepared ferrites is determined by where, r(Cd 2+ ), r(Ni 2+ ), r(Cu 2+ ), r(Co 2+ ) and r(Fe 2+ ) are the ionic radii while CCd, CNi, CCu, CCo and CFer are the concentration of Cd 2+ , Ni 2+ , Cu 2+ , Co 2+ and Fe 3+ respectively.…”

Section: Xrd Analysismentioning

confidence: 98%

Sol–Gel Auto-combustion Preparation of M2+ = Mg2+, Mn2+, Cd2+ Substituted M0.25Ni0.15Cu0.25Co0.35Fe2O4 Ferrites and Their Characterizations

Aslam

Rehman

Amin

et al. 2021

J Supercond Nov Magn

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Cost-effective and controllable synthesis of M0.25Ni0.15Cu0.25Co0.35Fe2O4 (M 2+ = Mg 2+ , Mn 2+ , and Cd 2+ ) ferrites via the sol-gel auto-combustion technique. The impact of divalent cations on the structural, dielectric, optoelectrical properties of ferrites was examined by XRD, FTIR, Raman, LCR, UV-vis, and two probe I-V measurement techniques. The crystallite size was 52.66 nm and the minimum specific surface area was observed 5.1507 m 2 /g for Mg 2+ doped NCCF ferrite. The FTIR and Raman analysis also confirmed the substitution of divalent cations (M 2+ = Mg 2+ , Mn 2+ , and Cd 2+ ) at their respective lattice sites. The maximum energy bandgap was 1.67 eV Mg 2+ doped NCCF ferrite as compared to other divalent ion-doped ferrites. The dielectric loss decreased while the ac conductivity increased with increasing frequency and the minimum values were observed for Mg 2+ doped NCCF ferrite. The activation energy was observed maximum for Mg 2+ doped NCCF ferrite (0.2234 eV). Due to incredible properties including small specific surface area, large energy band gap, high resistivity and loss dielectric loss of Mg 2+ doped NCCF ferrite have potential applications in different fields.

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Study of Electrical Transport Properties of Cadmium-Doped Zn–Mn Soft Ferrites by Co-precipitation Method

Cited by 26 publications

References 28 publications

Controllable synthesis of La3+ dopedZn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
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Controllable synthesis of La3+ dopedZn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
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58
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4
0
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Impact of Co2+ on the spectral, optoelectrical, and dielectric properties of Mg0.25Ni0.25Cu0.5−xCoxFe1.97La0.03O4 ferrites prepared via sol–gel auto-combustion route

Sol–Gel Auto-combustion Preparation of M2+ = Mg2+, Mn2+, Cd2+ Substituted M0.25Ni0.15Cu0.25Co0.35Fe2O4 Ferrites and Their Characterizations

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Study of Electrical Transport Properties of Cadmium-Doped Zn–Mn Soft Ferrites by Co-precipitation Method

Cited by 26 publications

References 28 publications

Controllable synthesis of La3+ dopedZn0.5Co0.25Cu0.25Fe2−xLRehman1, Morley2, Amin3 et al. 2020Ceramics InternationalSelf Cite58140View full textAdd to dashboardCite

Controllable synthesis of La3+ dopedZn0.5Co0.25Cu0.25Fe2−xLRehman1, Morley2, Amin3 et al. 2020Ceramics InternationalSelf Cite58140View full textAdd to dashboardCite

Impact of Co2+ on the spectral, optoelectrical, and dielectric properties of Mg0.25Ni0.25Cu0.5−xCoxFe1.97La0.03O4 ferrites prepared via sol–gel auto-combustion route

Sol–Gel Auto-combustion Preparation of M2+ = Mg2+, Mn2+, Cd2+ Substituted M0.25Ni0.15Cu0.25Co0.35Fe2O4 Ferrites and Their Characterizations

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Resources

About

Controllable synthesis of La3+ dopedZn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
Self Cite
58
1
4
0
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Controllable synthesis of La3+ dopedZn0.5Co0.25Cu0.25Fe2−xL
Rehman
¹
,
Morley
²
,
Amin
³

et al. 2020
Ceramics International
Self Cite
58
1
4
0
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