Physical properties, magnetic measurements, dielectric relaxation, and complex impedance studies of cobalt-doped zinc ferrite nanoparticles

Mahmood, Aamir; Maqsood, Asghari

doi:10.1007/s13204-021-02007-y

Cited by 15 publications

(11 citation statements)

References 90 publications

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“…It is seen in figures 7(a) and (b) that σ ac in our heterostructures increases with both frequency and temperature, a behaviour typical of ferrites. The Jonscher's power law σ ac = Aω n is used to determine n from the plot of σ ac versus f graph on log-log scale [27,40,41]. The value of n determines the nature of the conduction mechanism and has been plotted in figure 8 [33].…”

Section: Ac Conductivity (σ Ac )mentioning

confidence: 99%

“…This behaviour can be explained in the light of the fact that rise in temperature causes increase in drift velocity of charge carriers' resulting in enhancement of electron exchange between the Fe 2+ /Fe 3+ ions. This may also cause an accumulation of carriers on the grain boundary interface also resulting in a decreased resistance, causing an increase in tanδ with temperature [21,41].…”

Section: Dielectric Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Structural, electrical and dielectric properties of ZnFe₂O₄/Cu₂S 3D heterostructures

Rani,

Kaushik,

Saya

et al. 2023

Mater. Res. Express

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This work reports the fabrication of novel zinc ferrite-copper sulphide (ZnFe2O4/Cu2S) 3D heterostructures and subsequent investigation of the spectroscopic behaviour of various electrical parameters like conductivity, impedance and dielectric loss. The study reveals a non-monotonic behaviour of the real component of impedance (Z'), while the imaginary component of impedance (Z") exhibits a temperature-dependent relaxation frequency, with an estimated activation energy (Ea) of 220.13 meV. The dc conductivity (σdc) measurements reveal the semiconducting nature of the sample and a transition from a ferrimagnetic to a paramagnetic behaviour is reported at the Curie temperature of 327K. In case of ac conductivity (σac), Jonscher's power law σac = Aωn is followed and the exponent n is found to lie in the range 0.679 - 0.735 at different temperatures, which is best fitted into a polynomial of degree six. The temperature variation of n is suggestive of the overlapping large polaron tunnelling (OLPT) model. Further, ac activation energy (Eac) is also calculated, which is found to be smaller than the dc activation energy (Edc), indicating electron hopping between Fe3+ and Fe2+ ions. The numerically computed staying time (τ) of electrons in Fe3+/Fe2+ ionic sites varies with frequency as well as with temperature, ranging from 10-6s to 10-19s. A significant decrease in dielectric loss (tanδ) to the tune of 99% (from 75 at ~100Hz to 0.89 at ~1MHz) is reported at room temperature. In the present scenario, when smart materials like spinel ferrites have garnered significant attention for their promising magnetic and electric properties, our studies of the novel ZnFe2O4/Cu2S 3D heterostructures may provide immense possibilities for tailored applications in various electromagnetic applications.

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Section: Ac Conductivity (σ Ac )mentioning

confidence: 99%

Section: Dielectric Studiesmentioning

confidence: 99%

Structural, electrical and dielectric properties of ZnFe₂O₄/Cu₂S 3D heterostructures

Rani,

Kaushik,

Saya

et al. 2023

Mater. Res. Express

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“…Here M w represents the molecular weights, M S is the saturation magnetization, and 5585 is the magnetic factor [43]. M A and M B represent the tetrahedral and octahedral magnetic moments for the present system, respectively.…”

Section: Characterization Techniquesmentioning

confidence: 99%

Effect of manganese doping on the structural, mechanical, optical, and magnetic properties of zinc ferrite nanoparticles

Mahmood¹,

Maqsood²

2022

Phys. Scr.

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The effects of manganese doping on the structural, mechanical, optical, and magnetic properties of zinc ferrite nanoparticles (Zn1-xMnxFe 2 O 4, x = 0.00, 0.03, 0.06, 0.10) are reported. The variation in lattice parameters, average crystallite sizes, and the cation distribution of the mixed-spinel Zn1-xMnxFe 2 O 4 NPs were noticed. The spherical morphologies and particle sizes were observed using scanning electron microscopy (SEM), and the elemental composition was found using energy dispersive x-ray (EDX) spectroscopy. The FT-IR spectra showed significant absorption bands, and the values of Debye temperature (θD) increased with the doping of Mn2+ content and an increase in the lattice vibrations. UV-visible diffuse reflectance spectroscopy (DRS) was used to find the optical energy bandgap values from 1.87 to 1.98 eV. The magnetic properties were evaluated using a vibrating sample magnetometer (VSM). Significant variations between the experimental and theoretical magnetic moments were observed, suggesting that the present system showed Yafet-Kittel type magnetic ordering.

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“…Sono chemical process, sol-gel, chemical coprecipitation, reverse microemulsion, etc. [4][5][6][7][8] Selenium (Se) and Lanthanum (La) co-doped BiFeO 3 nanoparticles were prepared using a facile sol-gel synthesis technique for usage in both soft and hard ferromagnetic applications. Using the simple doublesolvent sol-gel process, La and Se doped bismuth ferrite nanostructures were created for the nanocomposites BiFe 1-x Se x O 3 (BF-Sex) and Bi 0.92 La .08 Fe 1-x Se x O 3 (L8Sex), where x = 0.1, 0.25, 0.5, 0.75, and 1.…”

Section: Introductionmentioning

confidence: 99%

“…The properties of magnetic nanostructures may theoretically be tuned by varying the reaction circumstances and surfactant type, which would change the shape, size, and chemical composition. [1,[4][5][6][7][8]14] Spinel ferrite nano-material shows their magnetic property from their antiferromagnetic coupling among octahedral and tetrahedral sub-lattices. Ni ideally goes for tetrahedral destinations making nickel ferrite a model reverse ferrite, Zn and Co go for octahedral ones making zinc and cobalt ferrite a model normal ferrite.…”

Section: Introductionmentioning

confidence: 99%

Employing the Microemulsion Synthesis Technique to Investigate the Structural and Magnetic Properties of Multicomponent Ferrite Nanoparticles

Kumar,

Singhal,

Chanana

2024

Cryst. Res. Technol.

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CoFe2O4, ZnFe2O4, NiFe2O4, Co0.5Ni0.5Fe2O4, Ni0.5Zn0.5Fe2O4, and Co0.5Zn0.5Fe2O4 are among the multicomponent ferrite nanoparticles that are created using the reverse microemulsion technique and a mixed surfactant. These nanoparticles are thoroughly characterized using techniques such as vibrating sample magnetometer (VSM), energy dispersive X‐ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT‐IR), and X‐ray diffraction (XRD). All the nanoparticles display a cubic spinel crystal structure, according to the X‐ray investigation. As the concentration of zinc increases, there is a noticeable rise in the lattice constant because the size of Zn+2 is more than Co+2. This study also investigates the relationship between the magnetic characteristics of nanocrystals and their matching size, composition, and features.

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Physical properties, magnetic measurements, dielectric relaxation, and complex impedance studies of cobalt-doped zinc ferrite nanoparticles

Cited by 15 publications

References 90 publications

Structural, electrical and dielectric properties of ZnFe₂O₄/Cu₂S 3D heterostructures

Structural, electrical and dielectric properties of ZnFe₂O₄/Cu₂S 3D heterostructures

Effect of manganese doping on the structural, mechanical, optical, and magnetic properties of zinc ferrite nanoparticles

Employing the Microemulsion Synthesis Technique to Investigate the Structural and Magnetic Properties of Multicomponent Ferrite Nanoparticles

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Physical properties, magnetic measurements, dielectric relaxation, and complex impedance studies of cobalt-doped zinc ferrite nanoparticles

Cited by 15 publications

References 90 publications

Structural, electrical and dielectric properties of ZnFe2O4/Cu2S 3D heterostructures

Structural, electrical and dielectric properties of ZnFe2O4/Cu2S 3D heterostructures

Effect of manganese doping on the structural, mechanical, optical, and magnetic properties of zinc ferrite nanoparticles

Employing the Microemulsion Synthesis Technique to Investigate the Structural and Magnetic Properties of Multicomponent Ferrite Nanoparticles

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Product

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Structural, electrical and dielectric properties of ZnFe₂O₄/Cu₂S 3D heterostructures

Structural, electrical and dielectric properties of ZnFe₂O₄/Cu₂S 3D heterostructures