Dielectric behaviour of Zn substituted Cu nano-ferrites

Parashar, Jyoti; Saxena, Vishal; Kumari, Jyoti; Bhatnagar, Deepak; Sharma, Komal

doi:10.1016/j.jmmm.2015.06.044

Cited by 50 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the dielectric constant increased with increasing x, thus showing that the hopping of charges between the charge carriers, which was initially between Fe 3+ and Fe 2+ , was further supported by the hopping of charges between the Cu 1+ and Cu 2+ state [21]. This is because of decline in resistivity (decrease in Zn concentration) which increases the probably for electrons to reach the grain boundary, which intensifies polarization and hence increases the dielectric constant [23,24].…”

Section: Dielectric Behaviormentioning

confidence: 95%

“…The charges are often separated over a considerable distance and the contribution to dielectric loss can therefore be orders of magnitude larger than the dielectric response due to molecular fluctuations. The dissipation of power in material is directly proportional to dielectric loss factor [16][17][18][19][20][21][22][23][24].…”

Section: Dielectric Behaviormentioning

confidence: 99%

“…At higher ω, the hopping cannot follow the applied field and lags behind, thus leading to a decrease in σ. Such a behavior can be related to the relaxation process caused by the domain reorientation, domain wall motion, and dipolar behavior [23][24][25].…”

Section: Ac Conductivitymentioning

confidence: 99%

See 2 more Smart Citations

Structural, Dielectric, and Magnetic Properties of SCS-Produced Copper Zinc Nanoferrites

Bharamagoudar

Patil²,

Mathad

2021

Int. J Self-Propag. High-Temp. Synth.

View full text Add to dashboard Cite

Zn-substituted copper nanoferrites Cu 1 -x Zn x Fe 2 O 4 (x = 0.0, 0.25, 0.50, 0.75, 1.0) were prepared by solution-combustion synthesis (SCS) and their structural, dielectric, and magnetic properties were characterized by XRD, magnetic, and impedance measurements. Based on X-ray diffraction patterns, various structural parameters such as lattice parameter, crystallite size, micro strain, dislocation density, hopping lengths, and bond lengths were derived. Furthermore, the effect of Zn 2+ dopant on the magnetic and frequency-dependent dielectric properties of synthesized ferrites was discussed. Our results may turn helpful to those engaged in R & D of new ferrites.

show abstract

Section: Dielectric Behaviormentioning

confidence: 95%

Section: Dielectric Behaviormentioning

confidence: 99%

See 1 more Smart Citation

Structural, Dielectric, and Magnetic Properties of SCS-Produced Copper Zinc Nanoferrites

Bharamagoudar

Patil²,

Mathad

2021

Int. J Self-Propag. High-Temp. Synth.

View full text Add to dashboard Cite

show abstract

“…This can be explained in the following way. According to previous works by various researchers that dielectric properties of ferrites attributes to four types of polarizations which are interfacial, dipolar, atomic and electronic out of which the first two increase with the rise in measuring temperature . The sample NiFe 1.90 Gd 0.10 O 4 shows lowest grain and grain boundary resistances and also rise in temperature causes more reduction in R g and R gb values.…”

Section: Resultsmentioning

confidence: 94%

Structural Interpretation of Ion Transport and Small Polaron Hopping Conduction in Gd Substituted Nickel Nanoferrites

Sinha

Dutta

2018

Physica Status Solidi (a)

View full text Add to dashboard Cite

In this work, structural, optical and electrical properties of Gd‐doped Nickel ferrite nanocrystalline materials [NiFe2−xGdxO4 (x = 0.00–0.15)] prepared through citrate auto‐ignition method are reported. The X‐ray diffraction (XRD) study reveals that prepared samples are purely single phase for lower Gd concentration but for higher Gd concentration, an orthorhombic phase of GdFeO3 appears which is confirmed from Rietveld analysis. The UV–Vis study points to the semiconducting nature of the prepared samples. The electrical analysis shows that the ac conductivity of the samples increases with the increase in Gd doping concentration upto x = 0.10 and then decreases. The dielectric relaxation process is analyzed using Havriliak–Negami formalism. The existence of small polaron hopping conduction is verified using Mott's variable range hopping model.

show abstract

“…where hkl are the Miller indices. X-ray densities of the sample (ρ X-ray ) were calculated using the lattice constant values [17]:…”

Section: Resultsmentioning

confidence: 99%

The Effect of Al³⁺ Additive on the Structural, Optical, and Magnetic Properties of Al-Cd Ferrites Fabricated by Coprecipitation Method

2018

View full text Add to dashboard Cite

In the present study, Al-Cd ferrites of nominal composition AlxCd1−xFe2O4 (x = 0-0.5) were prepared by coprecipitation method. The effect of Al +3 additive on the structural, optical, and magnetic properties of the as-prepared Al-Cd ferrites was investigated. Samples were characterized by X-ray diffraction, scanning electron microscopy, the Fourier transform infrared spectroscopy, UV spectroscopy and vibrating sample magnetometer techniques. The magnetic analysis indicated that all of the samples in different compositions showed ferromagnetic behavior. Along with the X-ray diffraction patterns, the formation of single-phase cubic spinel structure and the lattice parameter were identified in the range of 8.6492-8.6984 Å. Scanning electron microscopy measurements showed that the smallest ferrite nanoparticles were obtained when the stoichiometric composition factor (x) value was 0.4. As an additional characterization, the Fourier transform infrared spectra was investigated, and the characteristic absorption, bands belonging to ferrite nanoparticles were identical around 530 cm −1 and 430 cm −1. The tetrahedral and the octahedral complex formation was proved by the observation of higher frequency (ν1), and lower frequency (ν2) bands by Fourier transform infrared method, respectively. UV-Vis characterization performed for the determination of Eg values depending on changing Al concentration and found as 2.07-2.24 eV. From the magnetic measurements, all the Al-doped Cd ferrites exhibit S-shaped narrow hysteresis loops revealing soft ferromagnetic nature of the formed ferrites.

show abstract

Dielectric behaviour of Zn substituted Cu nano-ferrites

Cited by 50 publications

References 27 publications

Structural, Dielectric, and Magnetic Properties of SCS-Produced Copper Zinc Nanoferrites

Structural, Dielectric, and Magnetic Properties of SCS-Produced Copper Zinc Nanoferrites

Structural Interpretation of Ion Transport and Small Polaron Hopping Conduction in Gd Substituted Nickel Nanoferrites

The Effect of Al³⁺ Additive on the Structural, Optical, and Magnetic Properties of Al-Cd Ferrites Fabricated by Coprecipitation Method

Contact Info

Product

Resources

About

Dielectric behaviour of Zn substituted Cu nano-ferrites

Cited by 50 publications

References 27 publications

Structural, Dielectric, and Magnetic Properties of SCS-Produced Copper Zinc Nanoferrites

Structural, Dielectric, and Magnetic Properties of SCS-Produced Copper Zinc Nanoferrites

Structural Interpretation of Ion Transport and Small Polaron Hopping Conduction in Gd Substituted Nickel Nanoferrites

The Effect of Al3+ Additive on the Structural, Optical, and Magnetic Properties of Al-Cd Ferrites Fabricated by Coprecipitation Method

Contact Info

Product

Resources

About

The Effect of Al³⁺ Additive on the Structural, Optical, and Magnetic Properties of Al-Cd Ferrites Fabricated by Coprecipitation Method