Abstract
The Mössbauer studies of the magnetic structure of nickel ferrite (NiFe2O4) nanoparticles (NPs) are presented. It is shown that the redistribution of ions over nonequivalent crystallographic positions occurs upon a decrease in the size of NiFe2O4 crystallites to nanovalues, thus leading to the structural transformation of NiFe2O4 nanoparticles from inverse spinel to mixed spinel. It has been established that the magnetic moments of Fe ions in the volume of NiFe2O4 nanoparticles are ferromagnetically (collinearly) ordered, being noncollinear (or oblique) in the near-surface layer probably due to the frustration of moments in the near-surface layer of nanoparticles.
Keywords
Spinel
Materials science
Nanoparticle
Crystallite
Redistribution (election)
Magnetic moment
Ion
Ferrite (magnet)
Magnetic nanoparticles
Mössbauer spectroscopy
Surface layer
Nickel
Chemical physics
Condensed matter physics
Layer (electronics)
Crystallography
Nanotechnology
Chemistry
Composite material
Metallurgy
Subject Areas
Magnetic Properties and Synthesis of Ferrites
·Materials Chemistry ·Physical Sciences
Multiferroics and related materials
·Electronic, Optical and Magnetic Materials ·Physical Sciences
Iron oxide chemistry and applications
·Renewable Energy, Sustainability and the Environment ·Physical Sciences
Citations by Year
2020: 1
2021: 3
2022: 1
2023: 1
2024: 1
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