Structural, magnetic, optical, dielectric, electrical and modulus spectroscopic characteristics of ZnFe2O4 spinel ferrite nanoparticles synthesized via honey-mediated sol-gel combustion method

Yadav, Raghvendra Singh; Kuřitka, Ivo; Vilčáková, Jarmila; Urbánek, Pavel; Machovský, Michal; Masař, Milan; Holek, Martin

doi:10.1016/j.jpcs.2017.05.029

Cited by 137 publications

(30 citation statements)

References 94 publications

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“…In addition, the broadening of the observed peaks indicates the existence of electrical mechanism with a spread of the time relaxation processes. 67 The Cole-Cole plot (M 00 vs. M 0 ) for CETCo x (x ¼ 0.00, 0.05, 0.10) at T ¼ 680 K is shown in Fig. 12.…”

Section: Electrical Modulus Analysismentioning

confidence: 99%

Frequency and temperature-dependence of dielectric permittivity and electric modulus studies of the solid solution Ca_0.85Er_0.1Ti_1−xCo_4x/3O₃ (0 ≤ x ≤ 0.1)

et al. 2018

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Section: Electrical Modulus Analysismentioning

confidence: 99%

Frequency and temperature-dependence of dielectric permittivity and electric modulus studies of the solid solution Ca_0.85Er_0.1Ti_1−xCo_4x/3O₃ (0 ≤ x ≤ 0.1)

et al. 2018

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“…All other variations of x can be defined as mixed (random) spinel. Zinc ferrite in bulk form is a normal spinel, where divalent non‐magnetic Zn 2+ ions preferentially occupy tetrahedral (A) sites and all Fe 3+ ions occupy octahedral sites . However, in nanocrystalline ZnFe 2 O 4 Zn 2+ and Fe 3+ cations are distributed on both octahedral and tetrahedral sites leading to a mixed spinel structure resulting in enhanced magnetic, electric and gas sensing properties …”

Section: Resultsmentioning

confidence: 99%

“…Reduction of the lattice parameter can also be attributed to the presence of lattice defects . Yadav et al also associated variation in the lattice constant with distortion in the lattice and redistribution of cations. However, it has been shown that XRD is not the best method to deal with cation occupation .…”

Section: Resultsmentioning

confidence: 99%

“…Conventionally ZnFe 2 O 4 has a normal spinel structure with Zn 2+ cations occupying octahedral sites . However, the cation distribution in spinel ferrites and thus zinc‐ferrite, is greatly influenced by the synthesis procedure, especially when nanosized particles are obtained . Nanosized zinc‐ferrite particles have a mixed spinel structure, with the inversion parameter depending on the synthesis route .…”

Section: Introductionmentioning

confidence: 99%

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Investigation of ZnFe₂O₄ spinel ferrite nanocrystalline screen‐printed thick films for application in humidity sensing

Nikolić

Vasiljević

Luković

et al. 2019

Int J Applied Ceramic Tech

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Zinc ferrite nanocrystalline powder was obtained by solid state synthesis of starting zinc oxide and hematite nanopowders. Field emission scanning electron microscopy and transmission electron microscopy, X‐ray diffraction, X‐ray photoelectron spectroscopy and Raman spectroscopy confirmed the formation of nanocrystalline zinc‐ferrite powder with a mixed spinel structure with small amounts of remaining zinc oxide and hematite as impurities. Thick film paste was formed and screen printed on test interdigitated PdAg electrodes on alumina substrate. Formation of a porous nanocrystalline structure was confirmed by scanning electron microscopy and Hg porosimetry. Humidity sensing properties of zinc ferrite thick films were investigated by monitoring the change in impedance in the relative humidity interval 30%‐90% in the frequency range 42 Hz‐1 MHz at room temperature (25°C) and 50°C. At 42 Hz at both analyzed temperatures the impedance reduced ~46 times in the humidity range 30%‐90%. The dominant influence of grain boundaries was confirmed by analysis of complex impedance with an equivalent circuit.

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“…MHz at room temperature. [26] and ZnFe2O4 (8.44 Å) [27] ferrites. This behavior of the investigated mixed spinel structure of cobalt ferrite can be explained based on the replacement of the smaller Co 2+ ions (r = 0.72 Å), with larger Zn 2+ ions (r = 0.82 A).…”

Section: Characterization Studiesmentioning

confidence: 99%

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

Kershi

Aldirham

2020

Preprint

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Magnetic Co ferrite nanoparticles doped with non-magnetic ions (Zn2+) fabricated by modified inverse coprecipitation technique. X-ray calculations show that the average crystallite size (D) and the average lattice constant (a) of CoZn ferrite nanoparticles increase from 32.33 to 52.87 nm and from 8.39 to 8.41Ǻ respectively with increasing non-magnetic Zn2+ ions from 0.00 to 0.55. Morphological forms and M-O at A and B sites studied by SEM and FT-IR spectroscopy. Measurements of the structural, optical, electrical and magnetic characterization of the CoZn ferrite nanoparticles strongly depend on non-magnetic Zn2+ ions content (y). Non-magnetic ions transform Co ferrite from hard and dielectric nature to soft and semiconductor nature. Values of Coercivity and the remanence decrease as non-magnetic Zn2+ ions increases to the minimum values 955 Oe and 6 emu /g for the sample with Zn = 0.55. Co0.45Zn0.55Fe2O4 is might be suitable for high-frequency applications where it has the smallest value of optical gap, the largest value of resistivity and the lowest value of dielectric loss factor.

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Structural, magnetic, optical, dielectric, electrical and modulus spectroscopic characteristics of ZnFe2O4 spinel ferrite nanoparticles synthesized via honey-mediated sol-gel combustion method

Cited by 137 publications

References 94 publications

Frequency and temperature-dependence of dielectric permittivity and electric modulus studies of the solid solution Ca_0.85Er_0.1Ti_1−xCo_4x/3O₃ (0 ≤ x ≤ 0.1)

Frequency and temperature-dependence of dielectric permittivity and electric modulus studies of the solid solution Ca_0.85Er_0.1Ti_1−xCo_4x/3O₃ (0 ≤ x ≤ 0.1)

Investigation of ZnFe₂O₄ spinel ferrite nanocrystalline screen‐printed thick films for application in humidity sensing

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

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Structural, magnetic, optical, dielectric, electrical and modulus spectroscopic characteristics of ZnFe2O4 spinel ferrite nanoparticles synthesized via honey-mediated sol-gel combustion method

Cited by 137 publications

References 94 publications

Frequency and temperature-dependence of dielectric permittivity and electric modulus studies of the solid solution Ca0.85Er0.1Ti1−xCo4x/3O3 (0 ≤ x ≤ 0.1)

Frequency and temperature-dependence of dielectric permittivity and electric modulus studies of the solid solution Ca0.85Er0.1Ti1−xCo4x/3O3 (0 ≤ x ≤ 0.1)

Investigation of ZnFe2O4 spinel ferrite nanocrystalline screen‐printed thick films for application in humidity sensing

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

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Product

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Frequency and temperature-dependence of dielectric permittivity and electric modulus studies of the solid solution Ca_0.85Er_0.1Ti_1−xCo_4x/3O₃ (0 ≤ x ≤ 0.1)

Frequency and temperature-dependence of dielectric permittivity and electric modulus studies of the solid solution Ca_0.85Er_0.1Ti_1−xCo_4x/3O₃ (0 ≤ x ≤ 0.1)

Investigation of ZnFe₂O₄ spinel ferrite nanocrystalline screen‐printed thick films for application in humidity sensing