Investigation of structural, optical, and magnetic properties of Co2+ ions substituted CuFe2O4 spinel ferrite nanoparticles prepared via precipitation approach

Hammad, Talaat M.; Kuhn, S.; Amsha, Ayman Abu; Hempelmann, Rolf

doi:10.1007/s41779-020-00556-z

Cited by 19 publications

(15 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the magnetic moment in the B-sublattice was sequentially decreased with the increase in copper substitution, which results in lower magnetic moment of copper substituted spinel ferrite nanoparticles [ 59 ]. Similar results were noticed by other researchers [ 57 , 58 , 59 ]. The remanent (M r ) magnetization values were 3.2 emu/g, 0.48 emu/g, and 0 emu/g for CuCoF1, CuCoF2, and CuF3 sample, respectively.…”

Section: Resultssupporting

confidence: 92%

“…The decrease in the value of M s with a decrease of grain size is associated with an increase of the surface spin canting and dead magnetic layer [ 56 ]. The decrease in saturation magnetization (M s ) with an increase of Cu 2+ content can also be explained by the probable replacement of Co 2+ by Cu 2+ at the tetrahedral sites of the spinel ferrite lattice systems [ 57 ]. The observed variation in M s can be explained by the help of Neel’s two sub-lattice magnetization model [ 58 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

CuxCo1-xFe2O4 (x = 0.33, 0.67, 1) Spinel Ferrite Nanoparticles Based Thermoplastic Polyurethane Nanocomposites with Reduced Graphene Oxide for Highly Efficient Electromagnetic Interference Shielding

ANJU

Yadav

Pötschke

et al. 2022

IJMS

View full text Add to dashboard Cite

CuxCo1−xFe2O4 (x = 0.33, 0.67, 1)-reduced graphene oxide (rGO)-thermoplastic polyurethane (TPU) nanocomposites exhibiting highly efficient electromagnetic interference (EMI) shielding were prepared by a melt-mixing approach using a microcompounder. Spinel ferrite Cu0.33Co0.67Fe2O4 (CuCoF1), Cu0.67Co0.33Fe2O4 (CuCoF2) and CuFe2O4 (CuF3) nanoparticles were synthesized using the sonochemical method. The CuCoF1 and CuCoF2 exhibited typical ferromagnetic features, whereas CuF3 displayed superparamagnetic characteristics. The maximum value of EMI total shielding effectiveness (SET) was noticed to be 42.9 dB, 46.2 dB, and 58.8 dB for CuCoF1-rGO-TPU, CuCoF2-rGO-TPU, and CuF3-rGO-TPU nanocomposites, respectively, at a thickness of 1 mm. The highly efficient EMI shielding performance was attributed to the good impedance matching, conductive, dielectric, and magnetic loss. The demonstrated nanocomposites are promising candidates for a lightweight, flexible, and highly efficient EMI shielding material.

show abstract

Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

CuxCo1-xFe2O4 (x = 0.33, 0.67, 1) Spinel Ferrite Nanoparticles Based Thermoplastic Polyurethane Nanocomposites with Reduced Graphene Oxide for Highly Efficient Electromagnetic Interference Shielding

ANJU

Yadav

Pötschke

et al. 2022

IJMS

View full text Add to dashboard Cite

show abstract

“…Parameters obtained from XRD data are shown in Table 1. The lattice constant (a) can be calculated using the equation below [25]:…”

Section: Xrd and Ftir Analysismentioning

confidence: 99%

The structural, magnetic and optical performances of Ni0.2Zn0.2Co0.6Fe2O4 ferrites synthesized by sol-gel route

2021

View full text Add to dashboard Cite

In this work, four complexing agents participated in the synthesis of Ni 0.2 Zn 0.2 Co 0.6 Fe 2 O 4 ferrites by sol-gel route. The X-ray diffraction (XRD) pattern showed that samples had formed spinel phase. The Fourier transform infrared (FTIR) spectra of samples showed two absorption bands around 400 cm −1 and 600 cm −1 , which are the characteristics of spinel ferrites. SEM micrographs showed that the prepared particles had different shape. Vibrating sample magnetometer was used to characterize magnetic performances. The prepared samples showed typical hysteresis behaviors at room temperature. The Ni 0.2 Zn 0.2 Co 0.6 Fe 2 O 4 ferrite sample prepared with egg white as a complexing agent had high coercivity (1365.52 Oe) and remanent magnetization (23.95 emu/g), which indicated that the sample had a potential applications for magnetic storage devices. The sample prepared with egg white had a coercivity six times higher than coercivities (168.44-200.47 Oe) of other samples. These findings revealed that egg white is a suitable complexing agent to prepare Ni 0.2 Zn 0.2 Co 0.6 Fe 2 O 4 hard ferrite by sol-gel route. The optical properties are characterized using PL emission spectra and UV-visible absorption spectrum. From the optical band gap (Eg) value, the sample has the characteristics of a semiconductor material. KeywordsNi 0.2 Zn 0.2 Co 0.6 Fe 2 O 4 ferrite • Sol-gel route • Four complexing agents • Magnetic performances • Optical performances

show abstract

“…Along with the other parameters that have been addressed, interionic distances also change when cobalt is substituted in CuFe 2 O 4 . Additionally, the bond angles between the metal ions at the A and B sites also change consequently.…”

Section: Resultsmentioning

confidence: 99%

“…Along with the other parameters that have been addressed, interionic distances also change when cobalt is substituted in CuFe 2 O 4 . 27 Additionally, the bond angles between the metal ions at the A and B sites also change consequently. The bond angles have been determined and are shown in Table 3 based on the cation−anion distance (p, q, r, and s) and cation− cation distance (b−f).…”

Section: Resultsmentioning

confidence: 99%

Interplay of Anisotropy Energy Barrier and Self-Heating Efficiency of Cobalt-Substituted CuFe₂O₄ Nanoparticles

Phukan,

Kar,

Borah

2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

In this study, we delve into the intricate interplay between the anisotropy energy barrier and the self-heating efficiency of magnetic nanoparticles (MNPs). We embarked on this exploration by synthesizing Cu 1−x Co x Fe 2 O 4 (x = 0, 0.1, 0.3, and 0.5) MNPs using a straightforward coprecipitation method. Our magnetic assessments, conducted at different temperatures, unveiled a notable trend as we traversed from x = 0.1 to x = 0.5. Specifically, we observed a consistent increase in saturation magnetization, coercivity, and remanence. This pattern also extended to the anisotropy energy barrier, which was derived from the effective anisotropy constant determined through the temperature dependency of the coercivity method. However, an intriguing twist emerged when we scrutinized the specific absorption rate (SAR), calculated via the Box-Lucas method. Contrary to much of the existing literature, our experimental results showcased a decline in SAR concerning x. This experimental work challenges the conventional understanding of the relationship between the anisotropy energy barrier and the SAR value of these nanoparticles. This study prompts us to reconsider the intricate mechanisms governing the relaxation of magnetic moments and subsequent heat release when subjected to an alternating magnetic field. By doing so, we aim to gain fresh insights into the self-heating properties of MNPs and optimize their utilization to better understand their heat-release properties and ensure that they are used as efficiently as possible in a variety of biomedical applications.

show abstract

Investigation of structural, optical, and magnetic properties of Co2+ ions substituted CuFe2O4 spinel ferrite nanoparticles prepared via precipitation approach

Cited by 19 publications

References 54 publications

CuxCo1-xFe2O4 (x = 0.33, 0.67, 1) Spinel Ferrite Nanoparticles Based Thermoplastic Polyurethane Nanocomposites with Reduced Graphene Oxide for Highly Efficient Electromagnetic Interference Shielding

CuxCo1-xFe2O4 (x = 0.33, 0.67, 1) Spinel Ferrite Nanoparticles Based Thermoplastic Polyurethane Nanocomposites with Reduced Graphene Oxide for Highly Efficient Electromagnetic Interference Shielding

The structural, magnetic and optical performances of Ni0.2Zn0.2Co0.6Fe2O4 ferrites synthesized by sol-gel route

Interplay of Anisotropy Energy Barrier and Self-Heating Efficiency of Cobalt-Substituted CuFe₂O₄ Nanoparticles

Contact Info

Product

Resources

About

Investigation of structural, optical, and magnetic properties of Co2+ ions substituted CuFe2O4 spinel ferrite nanoparticles prepared via precipitation approach

Cited by 19 publications

References 54 publications

CuxCo1-xFe2O4 (x = 0.33, 0.67, 1) Spinel Ferrite Nanoparticles Based Thermoplastic Polyurethane Nanocomposites with Reduced Graphene Oxide for Highly Efficient Electromagnetic Interference Shielding

CuxCo1-xFe2O4 (x = 0.33, 0.67, 1) Spinel Ferrite Nanoparticles Based Thermoplastic Polyurethane Nanocomposites with Reduced Graphene Oxide for Highly Efficient Electromagnetic Interference Shielding

The structural, magnetic and optical performances of Ni0.2Zn0.2Co0.6Fe2O4 ferrites synthesized by sol-gel route

Interplay of Anisotropy Energy Barrier and Self-Heating Efficiency of Cobalt-Substituted CuFe2O4 Nanoparticles

Contact Info

Product

Resources

About

Interplay of Anisotropy Energy Barrier and Self-Heating Efficiency of Cobalt-Substituted CuFe₂O₄ Nanoparticles