Structural, mechanical, dielectric properties and magnetic interactions in Dy<sup>3+</sup>-substituted Co–Cu–Zn nanoferrites

Kadam, R.H.; Borade, Rameshwar B.; Mane, Maheshkumar L.; Mane, D.R.; Batoo, Khalid Mujasam; Shirsath, Sagar E.

doi:10.1039/d0ra05274d

Cited by 58 publications

(9 citation statements)

References 47 publications

(46 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is because the main contributor to the dielectric constant is the interfacial polarization which is tightly correlated to the conduction process. [41][42] with Co 2+ addition which is attributed to the agglomeration of the samples. Addition of higher magnetic ions in Zn-Cr-O lattice increases the particle agglomeration in the samples.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Structural, Magnetic, Dielectric and Optical Properties of Co Doped Cr-Zn Oxide Nanoparticles for Spintronic Devices

Balsure¹,

More²,

Kadam³

et al. 2022

Eng. Sci.

View full text Add to dashboard Cite

Dilute magnetic semiconductor (DMS) nanoparticles of Co doped Zn0.95Cr0.05O were synthesized by sol-gel auto-combustion technique. Crystallographic analysis was made by using X-ray diffraction (XRD) technique. Rietveld refined X-ray diffraction patterns confirm the single phase wurtzite type crystal structure with space group p63mc. Replacement of larger Zn 2+ ions by smaller Co 2+ reduces the lattice parameters 'a' and 'c'. Average crystallite estimated from Scherrer equation is found increasing from 17.6 to 22.0 nm with the addition of Co 2+ ions.Scanning electron micrographs (SEM) were used to understand the surface morphology of the samples. Average grain size obtained from SEM analysis is observed in the range 22.1 to 26.5 nm. Enriched ferromagnetism is observed for Co 2+ doped samples and the saturation magnetization increases from 0.0514 to 0.1026 emu/gm. At lower frequency region both dielectric constant () and dielectric loss tangent (tan ) have higher values and decreases with increasing frequency and becomes almost constant at higher frequency region. Energy band gap (Eg) is decreases from 3.26 to 2.69 eV with the addition of Co 2+ ions in Zn-Cr oxides. Enriched ferromagnetism and higher dielectric constant at low frequency make these materials suitable for spintronic devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis, Structural, Magnetic, Dielectric and Optical Properties of Co Doped Cr-Zn Oxide Nanoparticles for Spintronic Devices

Balsure¹,

More²,

Kadam³

et al. 2022

Eng. Sci.

View full text Add to dashboard Cite

show abstract

“…In addition to the Scherrer equation [38], the strain induced in the crystal lattice follows the following W-H relation [49]:…”

Section: Resultsmentioning

confidence: 99%

X-ray line profile analysis and magnetic and optical properties of FexZn0.95-xCr0.05O nanoparticles fabricated by sol-gel route

Balsure¹,

Gurav

Kadam³

et al. 2022

Cerâmica

Self Cite

View full text Add to dashboard Cite

Fe x Zn 0.95-x Cr 0.05 O nanoparticles have been obtained for the different concentrations of Fe ions by using the sol-gel method. The hexagonal wurtzite structure of all the samples was confirmed by Rietveld refined X-ray diffraction patterns. The addition of Fe ions decreased lattice constants a and c from 3.2487 to 3.2474 Å and 5.2043 to 5.2029 Å, respectively. Uniform deformation, uniform stress deformation, and uniform deformation energy density models were assumed to obtain the crystallite size and strain values from Williamson-Hall analysis. The average crystallite size obtained from all four methods showed increasing variation with the addition of Fe ions in Zn-Cr-O, which was found in good agreement with the Scherrer equation, scanning electron microscopy, and high-resolution transmission electron microscopy results. Energy-dispersive X-ray spectra of typical samples confirmed the stoichiometric proportion of constituent elements. Room temperature ferromagnetism was observed in all the Fe-free and Fe-doped samples. Optical studies were carried out by UV-visible spectrophotometry. The band gap values lay in the range of 3.275 to 3.215 eV.

show abstract

“…XRD was applied to study the structure of the prepared nanoparticles and their composites with rGO and TPU. The X-ray diffraction patterns of the prepared CZ1, CZ2, and CZ3 nanoparticles present the characteristic Bragg reflections related to (220), (311), (222), (400), (422), (511), (440), and (533) crystal planes of the cubic spinel ferrite crystal structure belonging to the space group Fd 3̅ m (Figure a). Figure a displays that all of the samples exhibit the same diffraction peaks.…”

Section: Results and Discussionmentioning

confidence: 99%

High-Performance, Lightweight, and Flexible Thermoplastic Polyurethane Nanocomposites with Zn²⁺-Substituted CoFe₂O₄ Nanoparticles and Reduced Graphene Oxide as Shielding Materials against Electromagnetic Pollution

et al. 2021

View full text Add to dashboard Cite

The development of flexible, lightweight, and thin high-performance electromagnetic interference shielding materials is urgently needed for the protection of humans, the environment, and electronic devices against electromagnetic radiation. To achieve this, the spinel ferrite nanoparticles CoFe 2 O 4 (CZ1), Co 0.67 Zn 0.33 Fe 2 O 4 (CZ2), and Co 0.33 Zn 0.67 Fe 2 O 4 (CZ3) were prepared by the sonochemical synthesis method. Further, these prepared spinel ferrite nanoparticles and reduced graphene oxide (rGO) were embedded in a thermoplastic polyurethane (TPU) matrix. The maximum electromagnetic interference (EMI) total shielding effectiveness (SE T ) values in the frequency range 8.2− 12.4 GHz of these nanocomposites with a thickness of only 0.8 mm were 48.3, 61.8, and 67.8 dB for CZ1-rGO-TPU, CZ2-rGO-TPU, and CZ3-rGO-TPU, respectively. The high-performance electromagnetic interference shielding characteristics of the CZ3-rGO-TPU nanocomposite stem from dipole and interfacial polarization, conduction loss, multiple scattering, eddy current effect, natural resonance, high attenuation constant, and impedance matching. The optimized CZ3-rGO-TPU nanocomposite can be a potential candidate as a lightweight, flexible, thin, and high-performance electromagnetic interference shielding material.

show abstract

Structural, mechanical, dielectric properties and magnetic interactions in Dy³⁺-substituted Co–Cu–Zn nanoferrites

Abstract: Improvement in various properties of Co–Cu–Zn ferrite upon Dy substitution.

Cited by 58 publications

References 47 publications

Synthesis, Structural, Magnetic, Dielectric and Optical Properties of Co Doped Cr-Zn Oxide Nanoparticles for Spintronic Devices

Synthesis, Structural, Magnetic, Dielectric and Optical Properties of Co Doped Cr-Zn Oxide Nanoparticles for Spintronic Devices

X-ray line profile analysis and magnetic and optical properties of FexZn0.95-xCr0.05O nanoparticles fabricated by sol-gel route

High-Performance, Lightweight, and Flexible Thermoplastic Polyurethane Nanocomposites with Zn²⁺-Substituted CoFe₂O₄ Nanoparticles and Reduced Graphene Oxide as Shielding Materials against Electromagnetic Pollution

Contact Info

Product

Resources

About

Structural, mechanical, dielectric properties and magnetic interactions in Dy3+-substituted Co–Cu–Zn nanoferrites

Abstract: Improvement in various properties of Co–Cu–Zn ferrite upon Dy substitution.

Cited by 58 publications

References 47 publications

Synthesis, Structural, Magnetic, Dielectric and Optical Properties of Co Doped Cr-Zn Oxide Nanoparticles for Spintronic Devices

Synthesis, Structural, Magnetic, Dielectric and Optical Properties of Co Doped Cr-Zn Oxide Nanoparticles for Spintronic Devices

X-ray line profile analysis and magnetic and optical properties of FexZn0.95-xCr0.05O nanoparticles fabricated by sol-gel route

High-Performance, Lightweight, and Flexible Thermoplastic Polyurethane Nanocomposites with Zn2+-Substituted CoFe2O4 Nanoparticles and Reduced Graphene Oxide as Shielding Materials against Electromagnetic Pollution

Contact Info

Product

Resources

About

Structural, mechanical, dielectric properties and magnetic interactions in Dy³⁺-substituted Co–Cu–Zn nanoferrites

High-Performance, Lightweight, and Flexible Thermoplastic Polyurethane Nanocomposites with Zn²⁺-Substituted CoFe₂O₄ Nanoparticles and Reduced Graphene Oxide as Shielding Materials against Electromagnetic Pollution