Properties of ferrites

Jadhav, Vijaykumar V.; Shirsat, Shubhangi D.; Tumberphale, Umakant B.; Mane, Rajaram S.

doi:10.1016/b978-0-12-819237-5.00003-1

Cited by 16 publications

(10 citation statements)

References 35 publications

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“…It is observed from figure 11 that in both X-band and K u -band, m¢ decreases with increasing frequency. From figure 12 it is observed that the magnetic loss (m) of the samples is low, which is a property of spinel ferrites [60] with peaks at certain matching frequencies in both X-and K u -band. Magnetic losses can arise from various phenomena, including magnetic hysteresis loss, eddy-current loss, domain wall resonance loss, and exchange resonance loss [61].…”

Section: High Frequency Permittivity and Permeability Studymentioning

confidence: 98%

Shielding effectiveness study of CoZCF-MWCNT nanocomposite materials and its possible application as EM pollution reducer

et al. 2023

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In this article Co0.40Zn0.40Cu0.20Fe2O4 (CoZCF) nanoparticles were synthesized using sol-gel method. The FESEM micrographs delineate the proper encapsulation of the soft magnetic nanoparticles inside the matrix of multi-walled carbon nanotubes (MWCNTs) and ensuring the proper fabrication of the CoZCF-MWCNT nanocomposites. The XRD analysis and Raman spectroscopy confirms the presence of the multi-phase nature of CoZCF-MWCNT nanocomposites. The static magnetic development of the nanocomposites as a function of temperature and the shielding effectiveness behavior in X-band and Ku-band of microwave radiation have been studied herein. Different static magnetic quantities were extracted. The magnetic observation confirms the presence of ferrimagnetic state with magnetization of 48.4 and 44.8 emu/g respectively at room temperature in CoZCF-MWCNT nanocomposites. The variation of hysteresis loop area with the lowering of temperature depicts the transformation of CoZCF-MWCNT nanocomposites from superparamagnetic to ferromagnetic state. The shielding effectiveness study was conducted in the X- and Ku- bands of electromagnetic radiation and the observation shows a high value of total shielding effectiveness (SET) of ∼ -31.3 dB corresponding to 10.7 GHz. This is due to the high of attenuation of > 99.9% and wide bandwidth. This improved SET of CoZCF-MWCNT nanocomposites gives us completely new insights for the construction of microwave absorber/Radar Absorbing Materials (RAMs) that can contest against harmful electromagnetic pollution.

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Section: High Frequency Permittivity and Permeability Studymentioning

confidence: 98%

Shielding effectiveness study of CoZCF-MWCNT nanocomposite materials and its possible application as EM pollution reducer

et al. 2023

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“…According to reports, ferrite (iron oxide) has an energy band gap of 2.2 eV [31], but its physical state changes when metallic ions like Cd 2+ , Zn 2+ , and Co 2+ are sandwiched into it. When the bivalent cationic metals in ferrite is replaced, the cations are redistributed on tetrahedral site-A and octahedral site-B, resulting in a change in energy band gap [32][33][34][35].…”

Section: Compositional Analysis Of Mfementioning

confidence: 99%

Investigating the magnetic domain structure and photonics characters of Singled Phased hard ferromagnetic Ferrite MFe3O4 (M= Co2+, Zn2+, Cd2+) Compounds

Ibiyemi,

Yusuf,

Akirinola

et al. 2024

J. Nig. Soc. Phys. Sci.

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The impact of transition metals on ferrite (iron (III) oxide) compounds is investigated in this study. Ferrite samples were synthesized using the co-precipitation method. X-ray analysis unveiled the presence of the Fe-phase in the trivalent state, showcasing a single-phased cubic spinel framework with a preferred orientation along the (311) reflection plane. Crystallite sizes were determined for CdFe3O4, ZnFe3O4, and CoFe3O4 utilizing the Scherer equation, yielding values of 10.54 nm, 18.76 nm, and 32.63 nm, respectively. Zinc ferrite displayed an intermediate photonic nature compared to cobalt and cadmium ferrite, with cadmium ferrite showing high optical losses and cobalt ferrite exhibiting minimal optical losses. EDX analysis confirmed the presence of Zn2+, Co2+, Fe3+, Cd2+, and O2? ions in the correct ratios, supporting the intended stoichiometric composition. Optical assessment revealed that CoFe3O4 nanoparticles are well-suited for optoelectronic devices, ultraviolet detectors, and infrared (IR) detectors. VSM measurements of cobalt ferrite exhibited higher coercivity and magnetic saturation compared to other samples. Photoluminescence (PL) spectroscopy revealed multiple colors, including cyan, green, and yellow, at different wavelengths for the ferrite samples. These findings suggest that the synthesized samples are suitable materials for high-frequency devices owing to their robust magnetic properties. Cadmium ferrite displayed a multi-magnetic domain structure, contrasting with the single-magnetic domain structure observed in zinc and cobalt ferrite.

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“…If A-site has lower valency than B-sites, the O(II) ions will be polarized towards B-sites. For instance, cadmium and zinc ferrites (CdFe 2 O 4 and ZnFe 2 O 4 ), divalent metallic ions Cd 2+ or Zn 2+ , and Fe 3+ are at A-sites B-sites, respectively (Jadhav et al 2020).…”

Section: Structural Analysismentioning

confidence: 99%

“…Ions located in the tetrahedral sub-lattice can line up their spins (e.g., parallel or antiparallel) to octahedral ions through the exchange interactions facilitated by the oxygen anions. Generally, ferrites are categorized into soft and hard based on their magnetic properties as follows (Jadhav et al 2020;Almessiere et al 2021).…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

et al. 2021

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The rapid urbanization and industrialization is causing worldwide water pollution, calling for advanced cleaning methods. For instance, pollutant adsorption on magnetic oxides is efficient and very practical due to the easy separation from solutions by an magnetic field. Here we review the synthesis and performance of magnetic oxides such as iron oxides, spinel ferrites, and perovskite oxides for water remediation. We present structural, optical, and magnetic properties. Magnetic oxides are also promising photocatalysts for the degradation of organic pollutants. Antimicrobial activities and adsorption of heavy metals and radionucleides are also discussed.

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Properties of ferrites

Cited by 16 publications

References 35 publications

Shielding effectiveness study of CoZCF-MWCNT nanocomposite materials and its possible application as EM pollution reducer

Shielding effectiveness study of CoZCF-MWCNT nanocomposite materials and its possible application as EM pollution reducer

Investigating the magnetic domain structure and photonics characters of Singled Phased hard ferromagnetic Ferrite MFe3O4 (M= Co2+, Zn2+, Cd2+) Compounds

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

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