Structure and magnetic properties of Cd doped copper ferrite

Rai, Radheshyam; Verma, Kavita; Sharma, Seema; Nair, Suresh; Kholkin, A. L.; Соболев, Н. А.

doi:10.1016/j.jallcom.2011.04.045

Cited by 16 publications

(7 citation statements)

References 32 publications

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“…The saturation magnetization of the sample displayed unsaturated behavior in the measured range. The low value of magnetic saturation of Ag mixed samples (30emu/g) compared to Cu 0.5 Cd 0.5 Fe 2 O 4 (45 emu/g) can be attributed to the Ag doping in the spinel structure [51]. This result is in good agreement with previous reports for Ag complexes with the spinel ferrite in nanocomposites [52,53].…”

Section: Structural and Morphological Characterizationsupporting

confidence: 91%

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Electrochemical investigation of Ag mixed Cd–Cu nanoferrite mixed reduced graphene oxide as improved platform for supercapacitor application

Shater

El‐Desoky²,

Meaz³

et al. 2023

J Mater Sci: Mater Electron

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Ag mixed Cd–Cu nanoferrite (Cd0.5Cu0.25Ag0.25Fe2O4; Ag-CCF) has been successfully prepared by co-precipitation method. The grain size of Ag mixed Cd–Cu ferrite was 10 nm estimated by HRTEM; while the specific surface area was measured by BET was 161 m2/g. The XRD measurement shows a good crystallization ferrite phase and FT-IR spectrum represents two characterized bands of spinel ferrite 428 cm−1 and 596 cm−1. The three broad peaks of Raman spectrum 276 cm−1, 386 cm−1 and 643 cm−1 are characterized of spinel phase. The VSM measurement has represented superparamagnetism with saturation magnetization 30 emu/g, remnant magnetization 1 emu/g and coercive field 38G. The Ag-CCF/rGO (reduced grapheme oxide) composite used for electrode in supercapacitor deliver specific capacitance of 306 F/g at scan rate 5 mV/s. Nyquist plot represented that charge transfer resistance of the Cd–CuFe2O4/rGO composites (82.3 Ω) was much smaller than that of the pristine Cd-CuFe2O4 (591 Ω). This can be ascribed to the introduction of conductive graphene improved the electrical conductivity of the composites, leading to the better rate capability and higher specific capacitance in comparison with the pristine Cd–CuFe2O4.

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Section: Structural and Morphological Characterizationsupporting

confidence: 91%

“…EDX spectra provides information about the elemental composition present in materials from the surface to the internal of the solids and it is used to affirm the homogeneity of the sample [51]. Figure 2c represents a typical EDX of Cd 0.5 Cu 0.25 Ag 0.25 Fe 2 O 4 sample.…”

Section: Structural and Morphological Characterizationmentioning

confidence: 99%

Electrochemical investigation of Ag mixed Cd–Cu nanoferrite mixed reduced graphene oxide as improved platform for supercapacitor application

Shater

El‐Desoky²,

Meaz³

et al. 2023

J Mater Sci: Mater Electron

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“…This leads to influence on the magnetic parameters, and an abrupt/rapid increase in saturation magnetization (M s ) and remanence (M r ) is observed up to x = 0.40. The increase in Cd 2+ content further will lead to decrease in these parameters, because the nonmagnetic Cd-contents become dominant at tetrahedral (A) site [27]. The M s and M r values are listed in Table 2; they …”

Section: Saturation Magnetization (M S ) Remanence (M R ) and Coercmentioning

confidence: 99%

Effect of Dopants Mn2+ and Cd2+ Concentration on Electrical and Magnetic Properties of Li-Mixed Spinel Nanoferrites

Faraz

Ahmad

2011

J Supercond Nov Magn

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Spinel mixed Li-ferrites with incorporation of various dopants (Cd 2+ and Ni 2+ ) concentration in ranges 0.00 ≤ x ≤ 0.80 are prepared using sol-gel technique. The various phases, lattice constant/parameter, X-ray density and crystallite size are confirmed using X-ray diffraction (XRD). The particle size and lattice parameters are found in the range 15-33 nm and 8.35-8.66 Å. This confirmed that incorporating dopant strongly influences the material structure and an increase is observed in lattice parameter and particle size with increase in dopant concentration. The structure is influenced by the dopant position, at the octahedral (B) and tetrahedral (A) sites. The decrease in activation energy (E) is observed with increase in dopant concentration. Furthermore, analysis of the crystallite size and morphology is done using scanning electron microscopy (SEM), which confirmed that the observed particle size is comparable with the X-ray diffraction (XRD) results. The dopant affects electrical properties such as dc electrical resistivity and drift mobility. The observed trend for drift mobility and dc electrical resistivity confirmed the semiconducting behavior of the synthesized material. The magnetic parameters saturation magnetization (M s ), remanence (M r ) and coercivity (H c ) are strongly affected by dopant concentration. A sudden increase in magnetic parameters M r and M s is observed A. Faraz ( ) Thermal Transport Laboratory (TTL), School of chemical and materials Engineering (by incorporating a small amount of dopant up to x = 0.40 and with further incorporation cause a decrease in the values of these parameters due to the non-magnetic behavior of incorporating dopant Cd 2+ ions. These decreases in values can be explained using the spin canted model and cations positioning at tetrahedral (A) and octahedral (B) sites. The decrease in Curie temperature, observed with increase in dopant incorporation, is due to the decrease/weakening interaction between tetrahedral (A) and octahedral (B) sites.

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“…Ferrite materials possessing spinel structures are crucial for basic disciplinary research, particularly in the study of the underlying relationship between crystal structure and magnetic effects [ 1 , 2 ]. The spinel-structured ferrite AFe 2 O 4 has superior structural, magnetic, and dielectric properties [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cd2+ Substitution on Structural–Magnetic and Dielectric Properties of Ni–Cu–Zn Spinel Ferrite Nanomaterials by Sol–Gel

Yang,

Lin

et al. 2023

Molecules

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CdxNi0.5−xCu0.2Zn0.3Fe2O4 (0 ≤ x ≤ 0.50) ferrite with a spinel structure was prepared using the sol–gel self-propagation method. The effects of Cd2+ doping on the structure, morphology, dielectric, and magnetic properties of Ni–Cu–Zn ferrite were examined using XRD, SEM, EDX, FTIR, MPMS, and dielectric tests. The cubic spinel structure was verified by XRD and FTIR analyses. The crystallite size and particle size information of the samples were obtained with XRD and SEM analysis. The sample particle size belonged to a class of nanoscale materials with a particle size range of 1–100 nm. The minor difference between the grain size and particle size indicated that the sample nanoparticles were composed of numerous microcrystals. The EDX spectra indicated that the samples contained all stoichiometric elements. MPMS was used to measure the hysteresis lines of the samples. According to the hysteresis line, the saturation magnetization intensity (Ms), coercivity (Hc), and magnetic moment (μB) of the sample increased and then decreased with the increase in cadmium concentration. The magnetization strength (Ms) is between 4–67 emu/g, and the coercivity (Hc) is between 9–46 Oe. The curves of the real part of the dielectric constant (ε′), the imaginary part of the dielectric constant (ε″), and the loss factor (tanδ) with frequency were measured in the frequency range 100 Hz–100 kHz by means of an impedance analyzer. The complex modulus spectrum was analyzed to understand the dynamics of the conduction process.

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Structure and magnetic properties of Cd doped copper ferrite

Cited by 16 publications

References 32 publications

Electrochemical investigation of Ag mixed Cd–Cu nanoferrite mixed reduced graphene oxide as improved platform for supercapacitor application

Electrochemical investigation of Ag mixed Cd–Cu nanoferrite mixed reduced graphene oxide as improved platform for supercapacitor application

Effect of Dopants Mn2+ and Cd2+ Concentration on Electrical and Magnetic Properties of Li-Mixed Spinel Nanoferrites

Effect of Cd2+ Substitution on Structural–Magnetic and Dielectric Properties of Ni–Cu–Zn Spinel Ferrite Nanomaterials by Sol–Gel

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