Effect of chromium substitution on the structural and magnetic properties of cobalt ferrite

Raju, G.S.N.; Murali, N.; Prasad, M. Hanuma; Suresh, B.; Babu, D. Apparao; Kiran, M. Gnana; Ramakrishna, A.; Wegayehu, M. Tulu; Babu, B.

doi:10.1016/j.mset.2018.11.001

Cited by 17 publications

(12 citation statements)

References 11 publications

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“…The result obtained is in agreement with the previous results [23]. The frequency absorption band ν 2 is assigned to the stretching vibration of the metal-oxygen bond in the tetrahedral site while the lower frequency absorption band ν 1 is attributed to the stretching vibration of the metal-oxygen bond in the octahedral sites, this conforms to the bond formation and phase stability of the prepared sample [21,32]. In this work, the absorption band for the two frequency regions is shifted toward the higher wave number as the concentration of the Cr 3+ ion increase.…”

Section: Edx Analysissupporting

confidence: 92%

Effects of Chromium(III) Ion Doping on Structural, Optical, and Magnetic Properties of Nickel–Cobalt Ferrite Nanoparticle

Senbeto

Elangovan

2023

Journal of Nanomaterials

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Chromium(III)-doped nickel–ferrite nanoparticles, with the general formula Ni0.5Co0.5CrxFe2−xO4 (x = 0.0, 0.10, and 0.20), were prepared by the sol–gel method. The prepared samples were sintered at 700°C for 5 hr. The XRD result showed that the prepared samples are in single-phase partially inverse cubic spinel ferrite structures with space group Fd3m. From the XRD characterization, the average crystallite size for all samples decreased from 39.54 to 30.42 nm and the lattice parameters are found to be 0.8324, 0.8320, and 0.8314 nm for x = 0.0, 0.10, and 0.20, respectively. The energy dispersive X-ray (EDX) spectroscopy analysis confirmed the presence of all ions as per the stoichiometric ratios. The vibrating sample magnetometer measurements revealed that the saturation magnetization (Ms), remnant magnetization (Mr), and coercive fields are found to be decreased with increasing concentration of Cr3+ ions. The UV–vis spectroscopy analysis showed that the energy bandgap (Eg) increased with increasing the concentration of Cr3+ ion from 1.61 to 1.96 eV. The Fourier transform infrared spectra show the two main absorption bands at 407–424 cm−1 and 547–588 cm−1 corresponding to stretching vibrations of metal–oxygen in the octahedral and tetrahedral sites, respectively.

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Section: Edx Analysissupporting

confidence: 92%

Effects of Chromium(III) Ion Doping on Structural, Optical, and Magnetic Properties of Nickel–Cobalt Ferrite Nanoparticle

Senbeto

Elangovan

2023

Journal of Nanomaterials

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“…It can be also seen in Fig. 3 that the increase of Zn 2+ ions leads to decrease the agglomeration between nano-particles, this behavior agrees with the report of G. Raju et al [35]. This behavior can be explained as follow; increasing the nonmagnetic ions (Zn 2+ ) at the expense of magnetic ions (Co 2+ ) leads to decrease the magnetic dipoles at the surface and magneto-static actions and hence decrease the aggregation.…”

Section: Morphological Analysis Of Cozn Ferrite Nano-particlessupporting

confidence: 88%

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

Kershi

Aldirham

2020

Preprint

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Magnetic Co ferrite nanoparticles doped with non-magnetic ions (Zn2+) fabricated by modified inverse coprecipitation technique. X-ray calculations show that the average crystallite size (D) and the average lattice constant (a) of CoZn ferrite nanoparticles increase from 32.33 to 52.87 nm and from 8.39 to 8.41Ǻ respectively with increasing non-magnetic Zn2+ ions from 0.00 to 0.55. Morphological forms and M-O at A and B sites studied by SEM and FT-IR spectroscopy. Measurements of the structural, optical, electrical and magnetic characterization of the CoZn ferrite nanoparticles strongly depend on non-magnetic Zn2+ ions content (y). Non-magnetic ions transform Co ferrite from hard and dielectric nature to soft and semiconductor nature. Values of Coercivity and the remanence decrease as non-magnetic Zn2+ ions increases to the minimum values 955 Oe and 6 emu /g for the sample with Zn = 0.55. Co0.45Zn0.55Fe2O4 is might be suitable for high-frequency applications where it has the smallest value of optical gap, the largest value of resistivity and the lowest value of dielectric loss factor.

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“…Magnesium ferrite is used in heterogeneous catalysis, adsorption, sensors, and magnetic technologies (1)(2)(3)(4) . The non-magnetic Cu resides in a tetrahedral (A) site whose doping can modify the structural, electrical, and magnetic properties (5)(6)(7) . Doping of Al (8,9) , Ge (10) , Cu (11) , Ni (12) , Cr (13) , Sm-Gd (14) , Ce-Gd (15) on magnesium ferrite and their effects on the electrical, dielectric and magnetic properties were studied (16)(17)(18) .…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu2+ substitution on structure, morphology, and magnetic properties of Mg-Zn spinel ferrite

Komali¹,

Murali²,

Parajuli³

et al. 2021

IJST

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Objective: To prepare Cu doped Mg 0.5−x Cu x Zn 0.5 Fe 2 O 4 (x = 0.0, 0.05, 0.1, 0.15, 0.2 and 0.25) spinel ferrites materials and study the structure, morphology, and magnetic properties. Methods: Cu doped Mg-Zn spinel ferrites are magnetic and highly resistive materials. They were synthesized by the method of solid-state reaction and characterized by x-ray diffraction (XRD), field effect scanning electron microscopy (FESEM), Fourier transform infrared (FTIR), and vibrating sample magnetometer (VSM) for their structural, compositional, morphological, functional properties. They are with spinel structure under Fd-3m space group. Their crystallite size was 44.58 nm to 31.02 nm range after calcined at 1000 o C. Their spinel structure was confirmed with FT-IR analysis, whose absorption bands were 598.84 -580.40 cm -1 and 405.35 -402.15 cm -1 range for higher and lower frequency, respectively. The value of coercivity is in the range 146.33 -9.427 Oe with the variation of content. The lower values of the coercivity indicated the soft ferrimagnetic nature of the synthesized materials. Findings/ Application: Substitution of non-magnetic Cu 2+ ions strongly influenced the structural and magnetic properties of magnesium ferrites.

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Effect of chromium substitution on the structural and magnetic properties of cobalt ferrite

Cited by 17 publications

References 11 publications

Effects of Chromium(III) Ion Doping on Structural, Optical, and Magnetic Properties of Nickel–Cobalt Ferrite Nanoparticle

Effects of Chromium(III) Ion Doping on Structural, Optical, and Magnetic Properties of Nickel–Cobalt Ferrite Nanoparticle

Altering the properties of the magnetic Co ferrite nanoparticles fabricated by modified inverse coprecipitation for high-frequency applications

Effect of Cu2+ substitution on structure, morphology, and magnetic properties of Mg-Zn spinel ferrite

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