Effect of Ce3+ ion doped Ni-Zn ferrites: Structural, optical and low temperature magnetic properties

kumar, N. Hari; Ravinder, D.; Edukondalu, Avula

doi:10.1016/j.cjph.2022.11.019

Cited by 23 publications

(3 citation statements)

References 45 publications

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“…Due to the solubility limit, the Nd 3+ ions are partially replaced by Fe 3+ ions, and the excess Nd 3+ ions aggregate at the grain boundaries, forming secondary phases. 19,20 The Scherrer formula was used to calculate the average crystallite size of the obtained samples: Table I. Structural parameters of the prepared Nd 3+ doped cobalt-cadmium ferrites.…”

Section: Resultsmentioning

confidence: 99%

Retracted: Rare Earth Nd³⁺ Doping Cobalt-Cadmium Nanoferrites Structural, Optical, and Magnetic Properties and Applications

Kumar

2024

ECS J. Solid State Sci. Technol.

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Nanoscale particles of neodymium-substituted cobalt-cadmium generic formula for nanoferrite Co0.4Cd0.6NdxFe2−xO4 samples at X = 0.000, 0.003, 0.005, 0.007, 0.009, and 0.011 were studied. The prepared powders were synthesised at low temperatures using citrate gel auto-combustion process. The synthesised powders were calcined at 500 °C for four hours. The morphological properties of the sintered powders were investigated, and their crystal structure was determined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD peaks confirmed the spinel ferrite structure. The lattice parameter was calculated from the XRD and showed decreasing trends with 8.442 to 8.308. SEM revealed an irregularly-shaped grain morphology with a homogeneous distribution. Raman spectroscopy analysis showed slight frequency changes in the Raman modes in doped samples, attributed to variations in the cation distribution. The peaks are located at 191, 291, 461, 591, and 671 cm−1. UV spectroscopy studies showed that the energy band gap values decrease with increasing Nd3+ concentration. Direct optical band gap values obtained were 1.238, 1.248, 1.199, 1.135, 1.134, and 1.101 eV with increasing Nd doping. The magnetic hysteresis properties were determined using a SQUID-VSM magnetometer. The hysteresis curves of Co0.4Cd0.6NdxFe2−xO4 nanoparticles show an increase in coercivity with increasing doping concentration. This enhancement is attributed to the multi-domain behaviour.

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Section: Resultsmentioning

confidence: 99%

Retracted: Rare Earth Nd³⁺ Doping Cobalt-Cadmium Nanoferrites Structural, Optical, and Magnetic Properties and Applications

Kumar

2024

ECS J. Solid State Sci. Technol.

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“…The O-H groups were found as a result of water molecules stretching and bending at about 2122.8 cm -1 , and 2030.8 cm -1 as a result of insufficient water removal during synthesis or adsorption of water molecules from the air. Accordingly, FTIR confirms doping by revealing the shifting of the peaks from initially 446.7 cm -1 and 527.8 cm -1 to 453 cm -1 , and 534 cm -1 after doping [12]. ) ( )…”

Section: The X-ray Diffraction Methodsmentioning

confidence: 77%

Physicochemical Investigation of Synthesized Bismuth and Silver-Doped Bismuth Nanoferrites, And Their Dielectric Properties

Kannolli,

Avinash

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Bismuth nano ferrite and silver-doped bismuth nano ferrite are synthesized by the sol-gel method. The synthesized compound is characterized through several characterization methods such as the X-ray diffraction method, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), and UV-Visible spectral studies. The X-Ray diffraction confirms bismuth nano ferrite has a Rhombohedral structure and belongs to the R-3m space group, and the silver-doped bismuth nano ferrite has an orthorhombic structure and belongs to the Cmcm space group. The crystallite size is calculated through Scherrer’s formula, the bismuth nano ferrite has a crystallite size of 20 nm, and the silver-doped bismuth nano ferrite has a crystallite size of 36.33 nm. FTIR studies confirm the formation of ferrite and indicate the metal ion group observed the peak shift after doping in the fingerprint region. The metal ion peaks are presented at 446.7 cm−1 and 527.8 cm−1 but after doping they shifted to 453 cm−1, 534 cm−1. The UV-Visible spectral analysis identifies the change in the energy band gap through a tauc plot, initially the energy band gap of bismuth nano ferrite is about 2.79 eV but after doping it reduces to 1.61 eV. the surface morphology is determined by SEM analysis and it provides 30 nm and for the doped compound 37 nm average particle size. Dielectric study confirms doping of silver to the bismuth gives more improved results which will be helpful at the application level such as in memory devices, photocatalysis, water splitting, and gas detection.

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“…Nickel-zinc spinel ferrites, such as essential magnetodielectric materials, have been investigated for many years due to their remarkable structural and electromagnetic properties. They find utilization in a many modern applications, including optical data storage devices [1], high frequency storage capacitors [2] automobiles, telecommunication equipment, data processing devices [3], magnetic cores, antenna rods [4] and a lot of others. As is widely known; the face centered cubic structure of spinel ferrites consists of tetrahedral (A) and octahedral (B) sites [4][5][6] occupied by the various types of metal ions distributed between A and B sites [6].…”

Section: Introductionmentioning

confidence: 99%

Ni/Zn ratio and La substitution effect on selected structural and magnetic properties of NiZn ferrites

Šoka,

Ušáková,

Dosoudil

et al. 2024

J. Phys.: Condens. Matter

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Auto-combustion process was used for synthetization of Ni1-xZnxFe2O4 and Ni1-xZnxLa0.02Fe1.98O4 (x = 0, 0.3, 0.5, 0.64 and 0.7) ferrite samples to investigate their structural and selected magnetic properties. Standard characterization method such as X-ray diffraction, magnetic susceptibility temperature dependencies measurement, low-frequency hysteresis loops recording and complex permeability spectra were used on the research samples. The monophasic ferrite compounds have been prepared. For all samples, with an increase in the content of zinc ions, a decrease in the value of the Curie temperature and coercive field and an increase in the value of the real part of the complex permeability were observed, together with a shift in the value of the ferrimagnetic resonance frequency to lower values. Substituted samples showed some differences, such as slightly higher values of the Curie temperature and coercive field, and at the same time slightly lower values of the real part of the complex permeability and higher values of the ferrimagnetic resonance frequency.

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Effect of Ce3+ ion doped Ni-Zn ferrites: Structural, optical and low temperature magnetic properties

Cited by 23 publications

References 45 publications

Retracted: Rare Earth Nd³⁺ Doping Cobalt-Cadmium Nanoferrites Structural, Optical, and Magnetic Properties and Applications

Retracted: Rare Earth Nd³⁺ Doping Cobalt-Cadmium Nanoferrites Structural, Optical, and Magnetic Properties and Applications

Physicochemical Investigation of Synthesized Bismuth and Silver-Doped Bismuth Nanoferrites, And Their Dielectric Properties

Ni/Zn ratio and La substitution effect on selected structural and magnetic properties of NiZn ferrites

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Effect of Ce3+ ion doped Ni-Zn ferrites: Structural, optical and low temperature magnetic properties

Cited by 23 publications

References 45 publications

Retracted: Rare Earth Nd3+ Doping Cobalt-Cadmium Nanoferrites Structural, Optical, and Magnetic Properties and Applications

Retracted: Rare Earth Nd3+ Doping Cobalt-Cadmium Nanoferrites Structural, Optical, and Magnetic Properties and Applications

Physicochemical Investigation of Synthesized Bismuth and Silver-Doped Bismuth Nanoferrites, And Their Dielectric Properties

Ni/Zn ratio and La substitution effect on selected structural and magnetic properties of NiZn ferrites

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Product

Resources

About

Retracted: Rare Earth Nd³⁺ Doping Cobalt-Cadmium Nanoferrites Structural, Optical, and Magnetic Properties and Applications

Retracted: Rare Earth Nd³⁺ Doping Cobalt-Cadmium Nanoferrites Structural, Optical, and Magnetic Properties and Applications