Structural and magnetic properties of yttrium and lanthanum-doped Ni-Co and Ni-Co-Zn spinel ferrites

Stergiou, Charalampos A.; Litsardakis, G.

doi:10.1063/1.4901668

Cited by 18 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…87-2337) with inverse spinel structure (S.G.: Fd-3m), as it is depicted in Figure 2. In particular for the S1 sample, by applying the Rietveld analysis of the XRD data the cell constant was refined to = 8.3918Å [16]. Beyond the similarities in crystal structure of the sintered ferrite, the respective SEM images reveal significant microstructural variations between them (Figures 3(a)-3(c)).…”

Section: Structural Propertiesmentioning

confidence: 99%

Microstructure and Electromagnetic Properties of Ni-Zn-Co Ferrite up to 20 GHz

Stergiou

2016

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

The present paper examines the relation between different developed microstructures and the microwave electromagnetic properties in Ni-Zn-Co ferrite. To this end, the Ni0.25Zn0.25Co0.5Fe2O4composition has been prepared with the conventional ceramic process with varied prefiringTP(750°C, 1000°C) and sinteringTStop temperatures (1200°C, 1250°C). When lower temperatures are applied in these production stages, incomplete microstructures with low density, higher porosity, or finer grains are achieved. On account of these features, the contributions of domain wall motion and spin rotation to the complex permeabilityμ⁎(f)move to higher frequencies, whereas microwave dielectric permittivityε⁎(f)is decreased. In particular in conjunction with the high Co content, the wall relaxation and spin resonance are interestingly forced to occur at 850 MHz and 8.05 GHz, respectively. Regarding the electromagnetic wave attenuation, the ferrite annealed at lower temperatures exhibits strong return loss peaks at higher frequencies, but without other performance improvement. We should notice that the variations in sintering temperatureTSyield the maximum changes in the recorded parameters, including the coercive field,μ⁎(f),andε⁎(f), indicating the inferior role of prefiringTPin Ni-Zn ferrite.

show abstract

Section: Structural Propertiesmentioning

confidence: 99%

Microstructure and Electromagnetic Properties of Ni-Zn-Co Ferrite up to 20 GHz

Stergiou

2016

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Saini et al [27] have investigated In substituted Ni-Co-Zn ferrites. Y and La Substituted Ni-Co-Zn ferrites have been investigated by Stergiou et al [28], Gd and La-doped Ni-Zn-Co ferrites are studied by Zhou et al [29] BaO-doped Ni-Zn-Co magneto-dielectric ferrites have been studied by Zheng et al [30]. We have also studied the Gd substituted Ni-Zn-Co ferrites [31].…”

Section: Introductionmentioning

confidence: 87%

Impact of V substitution on the physical properties of Ni–Zn–Co ferrites: structural, magnetic, dielectric and electrical properties

Hossain

Jamil

Hasan

et al. 2021

Mater. Res. Express

View full text Add to dashboard Cite

We have investigated the Vanadium- (V) substituted Ni–Zn–Co ferrites where the samples are prepared using the solid-state reaction technique. The impact of V5+ substitution on the structural, magnetic, dielectric and electrical properties of Ni–Zn–Co ferrites has been studied. The XRD analysis confirms the formation of a single-phase cubic spinel structure. The lattice constants have been calculated both theoretically and experimentally along with other structural parameters such as bulk density, x-ray density and porosity. The FESEM images are studied for analyzing the surface morphology. FTIR measurement confirms spinel structure formation. The saturation magnetization (M s), coercive field (H c) and Bohr magnet on (μ B) are calculated from the obtained M-H loops. The temperature-dependent permeability is studied to obtain the Curie temperature. The frequency and the composition dependence of permeability are also analyzed. Frequency dependent dielectric behavior and ac resistivity are also investigated. An inverse relationship is observed between the composition dependent dielectric constant and ac resistivity. The obtained results such as the electrical resistivity, dielectric constants and magnetic properties suggest the appropriateness of the studied ferrites in microwave device applications.

show abstract

Electromagnetic Interference Suppression and Electromagnetic Absorption

Koledintseva¹,

Rozanov²

2022

Modern Ferrites

View full text Add to dashboard Cite

Structural and magnetic properties of yttrium and lanthanum-doped Ni-Co and Ni-Co-Zn spinel ferrites

Cited by 18 publications

References 14 publications

Microstructure and Electromagnetic Properties of Ni-Zn-Co Ferrite up to 20 GHz

Microstructure and Electromagnetic Properties of Ni-Zn-Co Ferrite up to 20 GHz

Impact of V substitution on the physical properties of Ni–Zn–Co ferrites: structural, magnetic, dielectric and electrical properties

Electromagnetic Interference Suppression and Electromagnetic Absorption

Contact Info

Product

Resources

About