Effect of Mg-substitution in Co–Ni-Ferrites: Cation distribution and magnetic properties

Bhandare, Shilpa V.; Anupama, A.V.; Mishra, Manvi; Kumar, Rajiv; Jali, V. M.; Sahoo, Balaram

doi:10.1016/j.matchemphys.2020.123081

Cited by 49 publications

(7 citation statements)

References 60 publications

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“…The lattice constant has been calculated by using eq . 1 d 2 = h 2 + k 2 + l 2 a 2 where d is the interplanar spacing, ( h k l ) is the miler indices, and ( a ) is the lattice constant. The crystallite size is also calculated using Scherrer’s formula, as shown in eq t = k λ β .25em nobreak0em0.25em⁢ cos nobreak0em.25em⁡ θ where β is the full width peak at half-maximum (in radians) at the observed peak angle 2θ, k is the crystallite shape factor (and was considered as 0.94), and λ is the wavelength of X-ray.…”

Section: Resultsmentioning

confidence: 99%

“…The crystallite size is also calculated using Scherrer’s formula, as shown in eq 2 . 32 where β is the full width peak at half-maximum (in radians) at the observed peak angle 2θ, k is the crystallite shape factor (and was considered as 0.94), and λ is the wavelength of X-ray. The comparison of Mg-substituted and Ni-substituted cobalt ferrites is summarized in Table 1 .…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Characterization of Cobalt-Doped Ferrites for Biomedical Applications

et al. 2023

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Novel materials for biomedical applications are in critical need of time. In the present work, the antibacterial properties of Co 1−x Ni x Mg x Fe 2 O 4 nanoparticles (NPs) are assessed by the disc diffusion method for the common pathogen, that is, Gram-negative (Escherichia coli and Pseudomonas aeruginosa) and Gram-positive (Staphylococcus aureus) bacteria. Overnight grown bacterial cultures were individually lawn-cultured on nutrient agar plates. All samples of NP concentrations (2 mg/mL) were prepared in sterile water and dispensed by sonication. Sterile filter paper discs (1.0 mm) were saturated by the (doped CoFe 2 O 4 ) NP solution and incubated at 37 ± 0.1 °C for 24 h. The NPs with a fine size of 30−70 nm of Co 1−x Ni x Mg x Fe 2 O 4 were achieved using the sol−gel method by doping CoFe 2 O 4 initially with Ni and codoping with Mg, and their properties were studied by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Fourier transform infrared techniques. According to the results, Co 0.5 Ni 0.25 Mg 0.25 Fe 2 O 4 NPs exhibited potent antibacterial activities against s. aureus having an inhibition zone of 6.5 mm and P. aeruginosa having an inhibition zone of 6 mm as that were examined. The result shows that the bacteriostatic properties of NPs are used for numerous applications such as hyperthermia, antibacterial treatments, and targeted drug delivery.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Cobalt-Doped Ferrites for Biomedical Applications

et al. 2023

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“…In the last few decades, ferrites become important magnetic materials due to their superfluous magnetic characteristics which makes them useful for a number of research applications such as permanent magnets, storage devices, recording media etc. [1][2][3][4][5][6][7][8][9][10]10]. In 1950, according to the statement of Richard Feynman, ferrites are very difficult to investigate as a theoretical study but, as a part of technology and utilization, it is considered as one of the superior issues to analyse [11].…”

Section: Introductionmentioning

confidence: 99%

An Overview of Hard Ferrites: Types and Structures

Jasrotia

2023

Materials Research Foundations

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In 1950s, after the discovery of hexagonal ferrites called as hexaferrites, there has been an increasing level of curiosity in hexaferrites and still, it is increasing exponentially. Commercially and technologically, hexaferrites belong to a category of important magnetic materials due to their utilization in various applications such as permanent magnets, recording media, storage devices, rod antennas, high frequency devices, microwave devices etc. There are six types of hexagonal ferrites as M-type, Z-type, Y-type, X-type, U-type and W-type respectively, out of which, the most worldwide manufactured hexagonal ferrite is Barium M-type hexagonal ferrite named as BaM [1]. All categories of hexaferrites shows ferrimagnetic behaviour as their magnetic nature is inherently related to their crystal structure. The current chapter focuses on the classification and structure of hexagonal ferrites. In this book chapter, firstly, we report the six categories of hexaferrites as M, Y, W, X, Z, W and then, we provide a detailed comprehensive review of two approaches called as spinel and S/R/T based model for reporting the structure of hexagonal ferrites respectively. After that, we reported a comprehensive structure of each hexaferrite. Lastly, the concluding remarks have been presented in the current chapter.

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“…Any alteration in the distribution of cations between the tetrahedral and octahedral sites has a significant impact on their physical characteristics [12]. Because of its abundance in nature, ferromagnetic behavior that depends on particle size and shape, low eddy current and conductivity, high electrical resistivity, and electrochemical stability, Ni Ferrite is one of the most adaptable and significant soft ferrite materials in terms of technology [13,14].Numerous synthesis methods, such as solid-solids, melt heat, hydrothermal, ball milling, precipitation, wet chemical techniques, and sol-gel, are often used to create spinel iron with nanostructures [15][16][17][18][19][20]. The sol-gel method is the most widely used method among chemical synthesis techniques for creating pure rare earth element REE nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Study and Analysis of the Structural and Magnetic Properties of Nickel Iron Substituted with Different Proportions of Cerium

Mahmood¹,

Razeg²,

Ridha³

2023

PJMHS

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Magnetic nanoferrites were prepared from nickel substituted with pure cerium ions by the following formula, NiCexFe2-xO4, where (x = 0.00, 0.02, 0.06, 0.08, 0.1) and in different proportions and weights using the chemical sol-gel method, after which it was calcined at 600, 800, and 1000 °C. And by using different characterization methods to examine the prepared powders such as X-ray diffractometer (XRD), scanning electron microscopy (FESEM) and vibration sample magnetometer (VSM). The X-ray diffraction patterns of the prepared samples confirmed the formation of single-phase soft magnetic nanoparticles of spinel nature and measured the particle size by XRD and FESEM analysis. Through, EDS analysis it was confirmed that there are no extra impurities and that the samples are pure. The VSM technique was used to analyze the magnetic properties of the as-prepared composites, and the saturation magnetization (Ms) and coercivity (Hc) decreased with increasing concentration of compensated cerium ions. These properties reveal the highly magnetic nature of cerium-substituted nickel nanoparticles and their potential for use in modern communication technology. Keywords: Nanoparticles, Nickel ferrites, cerium ion, X-ray diffraction, FESEM analysis, VSM analysis

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Effect of Mg-substitution in Co–Ni-Ferrites: Cation distribution and magnetic properties

Cited by 49 publications

References 60 publications

Synthesis and Characterization of Cobalt-Doped Ferrites for Biomedical Applications

Synthesis and Characterization of Cobalt-Doped Ferrites for Biomedical Applications

An Overview of Hard Ferrites: Types and Structures

Study and Analysis of the Structural and Magnetic Properties of Nickel Iron Substituted with Different Proportions of Cerium

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