Comparative study of frequency-dependent dielectric properties of ferrites MFe2O4 (M = Co, Mg, Cr and Mn) nanoparticles

Mubasher,; Mumtaz, M.; Hassan, Mehwish; Ali, Liaqat; Ahmad, Zubair; Imtiaz, Maria; Aamir, Muhammad; Rehman, Abdul; Nadeem, K.

doi:10.1007/s00339-020-03529-y

Cited by 51 publications

(8 citation statements)

References 45 publications

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“…In the materialˈs structure, the specific surface area (SSA) can be specified physical and chemical processes of materials and is the overcoming variable for adsorption applications of nanoparticles, which is expressed by the following equation 36 : where S is the specific surface area, which has an inverse relation with crystallite size and X-ray density. Table 3 depicts the SSA values via crystallite size estimated by the four mentioned methods for all samples.…”

Section: Resultsmentioning

confidence: 99%

Study of Urbach energy and Kramers–Kronig on Mn and Zn doped NiFe2O4 ferrite nanopowder for the determination of structural and optical characteristics

Nazari,

Golzan,

Mabhouti

2024

Sci Rep

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MxNi1-xFe2O4 spinel ferrite (M = Mn, Zn, and x = 0, 0.05) has been successfully synthesized by co-precipitation technique with hydrazine hydrate reduction agent (instead of NaOH) and Ethylene glycol surfactant. The XRD spectra of the samples illustrated high crystallinity. The structural characterization of pure and doped fcc NiFe2O4 were calculated by Scherrer, Modified Scherrer, Williamson–Hall, and SSP methods. In comparison of several methods, the Scherrer method is unreasonable method and W–H method has an acceptable range and can calculate both < L > and strain without restriction. The specific surface area in Zn-doped increased, demonstrate increment of adsorption properties in Ni ferrite structure. TEM images revealed the shape of grains is spherical, cubic, and irregular, with a grain size in the range of 35–65 nm. Hysteresis loops illustrated the magnetic behavior of samples. From the reflectance data, the band gap energies were estimated at 1.984, 1.954, and 1.973 eV for un-doped, Mn, and Zn-doped NiFe2O4 respectively (red shift). The almost low value of Urbach energy for pure, Mn, and Zn -doped NiFe2O4 indicates low structural disorder, which can approve the high crystallinity of samples. Direct band gap energy (Eg), refractive index, and extinction coefficient were estimated by the Kramers–Kronig method with linear optical evaluations. The Eg by K-K method is in good agreement with the Eg by Kubelka–Munk function.

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Section: Resultsmentioning

confidence: 99%

Study of Urbach energy and Kramers–Kronig on Mn and Zn doped NiFe2O4 ferrite nanopowder for the determination of structural and optical characteristics

Nazari,

Golzan,

Mabhouti

2024

Sci Rep

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“…As usual,

′ decreases rapidly by increasing frequency at low frequencies but slowly until the frequency reaches about 4 MHz. This dispersion occurs because charge carrier hopping takes place from grains to grain boundaries and accumulates there due to the high resistivity of the grain boundaries, according to Maxwell–Wagner-type interfacial polarization [ 47 , 48 ]. At higher frequencies, the polarization process becomes increasingly difficult because charge carriers cannot follow the rapid variation of the applied electric field.…”

Section: Resultsmentioning

confidence: 99%

Delving into the properties of nanostructured Mg ferrite and PEG composites: A comparative study on structure, electrical conductivity, and dielectric relaxation

El-Ghazzawy,

Zakaly,

Alrowaily

et al. 2023

Heliyon

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“…Dielectric loss tangents for NiFe2O4, Ni0.5Zn0.5Fe2O4 and Ni0.5Mg0.5Fe2O4 found minimum at frequency 5KHz i.e. ⁓ 0.03 at room temperature, and these samples shows abnormal dielectric loss behaviour which is explained by resonance effect and peak behaviour by Debye relaxation theory and these peaks observed at applied electric field (23,30,31).…”

Section: Dielectric Loss Tangent Of Materialsmentioning

confidence: 91%

Magnetic Ferrites: A Brief Review About Substation on Electric and Magnetic Properties

Kaur¹,

Kaushal²,

Rana³

et al. 2022

ECS Trans.

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The bulk and nano dimensional ferrites have been widely studied over the last five decades to offer novelty of processing, structural variation during synthesis, and its possible utilization for the advancement of modern devices. Precisely, in order to improve the magnetic properties, the orientation of the atoms or electronic structures inside the crystal are the major causes. Many attempts have been made to understand the behavior of dopants in electronic structures as well as magnetic effects. In addition, an in-depth analysis of the findings published by various researchers is offered here to assist readers in evaluating the previously investigated, variably doped ferrites for their electric and magnetic properties.

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Comparative study of frequency-dependent dielectric properties of ferrites MFe2O4 (M = Co, Mg, Cr and Mn) nanoparticles

Cited by 51 publications

References 45 publications

Study of Urbach energy and Kramers–Kronig on Mn and Zn doped NiFe2O4 ferrite nanopowder for the determination of structural and optical characteristics

Study of Urbach energy and Kramers–Kronig on Mn and Zn doped NiFe2O4 ferrite nanopowder for the determination of structural and optical characteristics

Delving into the properties of nanostructured Mg ferrite and PEG composites: A comparative study on structure, electrical conductivity, and dielectric relaxation

Magnetic Ferrites: A Brief Review About Substation on Electric and Magnetic Properties

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