Structural and Magnetic Properties of NiCr x Fe2−x O4 Nanoparticles Synthesized via Microwave Method

Baykal, A.; Elmal, A. Z.; Sertkol, M.; Sözeri, H.

doi:10.1007/s10948-015-3191-6

Cited by 10 publications

(2 citation statements)

References 25 publications

(36 reference statements)

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“…Coercivity, anisotropic constant, and uniaxial anisotropy were described as decreasing with the addition of m and Ce ions into nano-cobalt ferrites [13]. Several methods have been used to synthesize nickel-substituted cobalt ferrites, Co 1−x Ni x Fe 2 O 4 , such as the auto-combustion method, aerosol route, and co-precipitation method [14,15,16]. Chen et al [17] prepared Ni 1−x Co x Fe 2 O 4 nanoparticles (NPs) using the hydrothermal method and studied the increasing trend in saturation magnetization with increasing cobalt content, which occurred due to the substitution of an Ni 2+ ion to a Co 2+ ion.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nb3+ Substitution on the Structural, Magnetic, and Optical Properties of Co0.5Ni0.5Fe2O4 Nanoparticles

et al. 2019

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Co0.5Ni0.5NbxFe2−xO4 (0.00 ≤ x ≤ 0.10) nanoparticles (NPs) were prepared using the hydrothermal approach. The X-ray powder diffraction (XRD) pattern confirmed the formation of single-phase spinel ferrite. The crystallite size was found to range from 18 to 26 nm. The lattice parameters were found to increase with greater Niobium ion (Nb3+) concentration, caused by the variance in the ionic radii between the Nb3+ and Fe3+. Fourier transform infrared analysis also proved the existence of the spinal ferrite phase. The percent diffuse reflectance (%DR) analysis showed that the value of the band gap increased with growing Nb3+ content. Scanning electron microscopy and transmission electron microscopy revealed the cubic morphology. The magnetization analyses at both room (300 K, RT) and low (10 K) temperatures exhibited their ferromagnetic nature. The results showed that the Nb3+ substitution affected the magnetization data. We found that Saturation magnetization (Ms), Remanence (Mr), and the Magnetic moment ( n B ) decreased with increasing Nb3+. The squareness ratio (SQR) values at RT were found to be smaller than 0.5, which postulate a single domain nature with uniaxial anisotropy for all produced ferrites. However, different samples exhibited SQRs within 0.70 to 0.85 at 10 K, which suggests a magnetic multi-domain with cubic anisotropy at a low temperature. The obtained magnetic results were investigated in detail in relation to the structural and microstructural properties.

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Section: Introductionmentioning

confidence: 99%

Effect of Nb3+ Substitution on the Structural, Magnetic, and Optical Properties of Co0.5Ni0.5Fe2O4 Nanoparticles

et al. 2019

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“…The authors of work [16] fabricated powders of examined ferrites with an average crystallite size of 23-32 nm in the so-called "microwave" way, by us-ing the solutions of metal nitrates and a microwave oven. They studied the structural and magnetic properties of those ferrites by measuring the hysteresis loops at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Hysteresis and Curie Temperature in Nickel-Chromium Ferrites Synthesized by Sol-Gel Auto-Combustion Method

Bushkova¹

2017

Ukr. J. Phys.

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Nanopowders of nickel-chromium ferrites with the general formula NiCr Fe2− O4 are synthesized, by using the sol-gel auto-combustion method. Specimens of all ferrite compositions had a cubic spinel structure. The average size of powder crystallites varied from 23 to 43 nm. After the powders were pressed and sintered at a temperature of 1573 K, the average size of crystallites grew to 65-83 nm. The shape of a hysteresis loop (the low coercivity c) showed that the specimens were soft magnetic materials. The residual magnetic field induction r decreased with the growing concentration of Cr 3+ ions due to the weakening of the interaction between the spinel sublattices, whereas c increased at that. The increase of the Cr 3+ ion content in the ferrite specimens diminished the value of specific saturation magnetization s from 33.9 to 7.7 A m 2 / , which testifies that less magnetic Cr 3+ ions substitute Fe 3+ ones in the ferrite octahedral sublattice. The magnetic moments calculated for the proposed cation distribution in the framework of the Néel two-sublattice model turned out some lower than the experimentally measured values, which can be explained as a manifestation of the tilted spin effect and the influence of a surface layer 0.22-2.01 nm in thickness with a violated magnetic structure. As the temperature was lowered to 77 K, the magnetic parameters of the ferrite cores increased owing to their superparamagnetic properties. The Curie temperature decreased from 831 to 685 K with the growth of Cr content.

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Effect of Dy3+ substitution on structural and magnetodielectric properties of Mn–Zn ferrites synthesized by microwave hydrothermal method

Neelima¹,

Usha²,

Ramesh³

et al. 2023

J Mater Sci: Mater Electron

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Structural and Magnetic Properties of NiCr x Fe2−x O4 Nanoparticles Synthesized via Microwave Method

Cited by 10 publications

References 25 publications

Effect of Nb3+ Substitution on the Structural, Magnetic, and Optical Properties of Co0.5Ni0.5Fe2O4 Nanoparticles

Effect of Nb3+ Substitution on the Structural, Magnetic, and Optical Properties of Co0.5Ni0.5Fe2O4 Nanoparticles

Magnetic Hysteresis and Curie Temperature in Nickel-Chromium Ferrites Synthesized by Sol-Gel Auto-Combustion Method

Effect of Dy3+ substitution on structural and magnetodielectric properties of Mn–Zn ferrites synthesized by microwave hydrothermal method

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