Magnetic properties of magnetite nanowire arrays

The contributions of isolated Fe3+ ions and the ferrimagnetic subsystem to the total magnetization of Fe3O4 nanowires were separated. The magnetic anisotropy of nanowires was determined. The value of the magnetic anisotropy is smaller than the expected value of the shape anisotropy. The decrease in...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-03, Vol.1199 (1), p.12026
Main Authors: Kostyuchenko, S A, Ziborov, G G, Dmitrieva, M S, Dmitriev, A I
Format: Article
Language:English
Subjects:
Anisotropy
Arrays
Dipole interactions
Electron paramagnetic resonance
Electron spin
Iron oxides
Magnetic anisotropy
Magnetic properties
Magnetoresistance
Magnetoresistivity
Nanowires
Spin resonance
Subsystems
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Summary:The contributions of isolated Fe3+ ions and the ferrimagnetic subsystem to the total magnetization of Fe3O4 nanowires were separated. The magnetic anisotropy of nanowires was determined. The value of the magnetic anisotropy is smaller than the expected value of the shape anisotropy. The decrease in the magnetic anisotropy in nanowires can be explained by the dipole-dipole interaction between individual nanowires in the array. The Verwey transition suppression was found. A phase-inverted line corresponding to the microwave magnetoresistance was identified in the electron spin resonance spectra of nanowires.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1199/1/012026