Nanoferrites of nickel doped with cobalt: Influence of Co2+ on the structural and magnetic properties

Rodrigues, A.P.G.; Gomes, D.K.S.; Araújo, J.H. de; Melo, D.M.A.; Oliveira, Nagyla A.; Braga, Renan Marinho

doi:10.1016/j.jmmm.2014.09.045

Cited by 29 publications

(17 citation statements)

References 30 publications

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“…No impurity phases were detected in the X-ray spectra. The lattice parameter was found to be 8.3669 Å which matches closely with the value reported in the literature [3]. The average crystallite size calculated using Scherrer's formula was found to be 26.12 nm.…”

Section: Thermal Analysis Of the Precursorsupporting

confidence: 86%

“…Ferrite nanoparticles are of great interest because of their scientific aspects in understanding the fundamentals of nanomagnetism and their extensive applications [1] in permanent magnets, targeted drug delivery, high-density information storage devices, ferrofluid technology, magnetic resonance imaging and heterogeneous catalysis [2,3]. The spinel ferrite structure consists of a cubic close-packed array of anions, with one eighth of the tetrahedral (A) and one half of the octahedral (B) interstitial sites occupied by cations.…”

Section: Introductionmentioning

confidence: 99%

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Preparation, spectroscopic and thermal analysis of hexa-hydrazine nickel cobalt ferrous succinate precursor and study of solid-state properties of its nanosized thermal product, Ni0.5Co0.5Fe2O4

Coutinho

Verenkar

2016

J Therm Anal Calorim

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Nickel cobalt ferrite, Ni 0.5 Co 0.5 Fe 2 O 4 , has been prepared by precursor combustion technique from hexahydrazine nickel cobalt ferrous succinate precursor. The precursor was characterized by chemical analysis, CHNS analysis, infrared spectroscopy, TG-DTA and mass loss studies. The thermal data show how the precursor decomposes in four steps to give stable ferrite phase. The precursor decomposes autocatalytically once initially ignited, to give the 'as-prepared' nano-spinel ferrite. The X-ray diffraction analysis reveals single cubic spinel phase structure. The infrared measurements between 4000 and 350 cm -1 confirmed the intrinsic cation vibrations of the spinel structure. The SEM image clearly shows the nanosized nature of the ferrite. The dielectric constant and loss tangent are found to decrease with increase in frequency which is due to Maxwell-Wagner interfacial polarization. The loss tangent shows a relaxation peak at *1 kHz. The variation of DC electrical resistivity with temperature indicates semiconductor behaviour. The temperature-and field-dependent magnetization data of 'as-prepared' ferrite reveal that the lattice has either a canted or partially misaligned spin structure due to the nanosized nature of the ferrite.

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Section: Thermal Analysis Of the Precursorsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Preparation, spectroscopic and thermal analysis of hexa-hydrazine nickel cobalt ferrous succinate precursor and study of solid-state properties of its nanosized thermal product, Ni0.5Co0.5Fe2O4

Coutinho

Verenkar

2016

J Therm Anal Calorim

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“…Moreover, increasing the reduction temperature accelerated the particle size growth and caused a more perfect crystal structure of magnetic nanopowders, which additionally increased the magnetization value. The increased particle size resulted in the reduction in surface atom number, which contributes to the misaligned constituent of spin magnetic moment and gains the magnetization of the material as a whole [ 11 , 12 , 13 , 36 , 37 ].…”

Section: Resultsmentioning

confidence: 99%

“…The most widely used materials are composed of Fe, Co, and Ni individually or in the form of composites [ 11 , 12 , 13 , 14 , 15 ]. However, up to today, the combination of the Fe–Co–Ni ternary system is not understood properly.…”

Section: Introductionmentioning

confidence: 99%

“…Following this, it is possible to control the nanoscale magnetic material characteristics by changing the size, shape, composition, and structure of nanocomposites within certain limits [ 3 , 4 , 5 , 6 , 11 , 12 , 13 , 14 , 15 ]. In turn, not all methods for nanopowder production allow for controlling their properties during the process.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Iron on the Fe–Co–Ni Ternary Nanocomposites Structural and Magnetic Features Obtained via Chemical Precipitation Followed by Reduction Process for Various Magnetically Coupled Devices Applications

et al. 2021

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This paper presents the synthesis of Fe–Co–Ni nanocomposites by chemical precipitation, followed by a reduction process. It was found that the influence of the chemical composition and reduction temperature greatly alters the phase formation, its structures, particle size distribution, and magnetic properties of Fe–Co–Ni nanocomposites. The initial hydroxides of Fe–Co–Ni combinations were prepared by the co-precipitation method from nitrate precursors and precipitated using alkali. The reduction process was carried out by hydrogen in the temperature range of 300–500 °C under isothermal conditions. The nanocomposites had metallic and intermetallic phases with different lattice parameter values due to the increase in Fe content. In this paper, we showed that the values of the magnetic parameters of nanocomposites can be controlled in the ranges of MS = 7.6–192.5 Am2/kg, Mr = 0.4–39.7 Am2/kg, Mr/Ms = 0.02–0.32, and HcM = 4.72–60.68 kA/m by regulating the composition and reduction temperature of the Fe–Co–Ni composites. Due to the reduction process, drastic variations in the magnetic features result from the intermetallic and metallic face formation. The variation in magnetic characteristics is guided by the reduction degree, particle size growth, and crystallinity enhancement. Moreover, the reduction of the surface spins fraction of the nanocomposites under their growth induced an increase in the saturation magnetization. This is the first report where the influence of Fe content on the Fe–Co–Ni ternary system phase content and magnetic properties was evaluated. The Fe–Co–Ni ternary nanocomposites obtained by co-precipitation, followed by the hydrogen reduction led to the formation of better magnetic materials for various magnetically coupled device applications.

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The Practical and Industrial Significance of Magnetic Materials Based on NiFe2O4. A Review

Ivanenko

Lesik

2021

Springer Proceedings in Physics

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Nanoferrites of nickel doped with cobalt: Influence of Co2+ on the structural and magnetic properties

Cited by 29 publications

References 30 publications

Preparation, spectroscopic and thermal analysis of hexa-hydrazine nickel cobalt ferrous succinate precursor and study of solid-state properties of its nanosized thermal product, Ni0.5Co0.5Fe2O4

Preparation, spectroscopic and thermal analysis of hexa-hydrazine nickel cobalt ferrous succinate precursor and study of solid-state properties of its nanosized thermal product, Ni0.5Co0.5Fe2O4

Impact of Iron on the Fe–Co–Ni Ternary Nanocomposites Structural and Magnetic Features Obtained via Chemical Precipitation Followed by Reduction Process for Various Magnetically Coupled Devices Applications

The Practical and Industrial Significance of Magnetic Materials Based on NiFe2O4. A Review

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