Dependence of Structural, Morphological and Magnetic Properties of Manganese Ferrite on Ni-Mn Substitution

This paper presents the influence of Mn substitution by Ni on the structural, morphological and magnetic properties of Mn Ni Fe O @SiO (x = 0, 0.25, 0.50, 0.75, 1.00) nanocomposites (NCs) obtained by a modified sol-gel method. The Fourier transform infrared spectra confirm the formation of a SiO mat...

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Bibliographic Details
Published in:International journal of molecular sciences 2022-03, Vol.23 (6), p.3097
Main Authors: Dippong, Thomas, Levei, Erika Andrea, Deac, Iosif Grigore, Petean, Ioan, Cadar, Oana
Format: Article
Language:English
Subjects:
amorphous silica matrix
Anisotropy
Annealing
annealing temperature
Composite materials
Crystal structure
Crystallinity
Crystallites
Crystals
Dielectric properties
Diffraction patterns
Ferric Compounds
Fourier transforms
Infrared spectra
Lattice parameters
Magnetic fields
Magnetic moments
Magnetic Phenomena
Magnetic properties
Magnetic saturation
Magnetics
Magnetization
Manganese
Manganese Compounds
manganese ferrite
Morphology
Nanocomposites
Nanomaterials
Nanoparticles
Particle size
Permeability
Silicon dioxide
Silicon Dioxide - chemistry
Sol-gel processes
Substitutes
X-Ray Diffraction
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Summary:This paper presents the influence of Mn substitution by Ni on the structural, morphological and magnetic properties of Mn Ni Fe O @SiO (x = 0, 0.25, 0.50, 0.75, 1.00) nanocomposites (NCs) obtained by a modified sol-gel method. The Fourier transform infrared spectra confirm the formation of a SiO matrix and ferrite, while the X-ray diffraction patterns show the presence of poorly crystalline ferrite at low annealing temperatures and highly crystalline mixed cubic spinel ferrite accompanied by secondary phases at high annealing temperatures. The lattice parameters gradually decrease, while the crystallite size, volume, and X-ray density of Mn Ni Fe O @SiO NCs increase with increasing Ni content and follow Vegard's law. The saturation magnetization, remanent magnetization, squareness, magnetic moment per formula unit, and anisotropy constant increase, while the coercivity decreases with increasing Ni content. These parameters are larger for the samples with the same chemical formula, annealed at higher temperatures. The NCs with high Ni content show superparamagnetic-like behavior, while the NCs with high Mn content display paramagnetic behavior.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms23063097