Abstract
Abstract: The composition and the magnetic structure of Fe3O4/γ-Fe2O3 nanoparticles placed into external magnetic field with a strength of 1.8 kOe are studied with Mössbauer spectroscopy. We showed that the thickness of the maghemite (γ-Fe2O3) shell can be changed by the synthesis conditions. We found that there is a layer, in which the magnetic moments are not oriented collinearly to those located in the depth of the shell, on the surface of maghemite (γ-Fe2O3) shell in the Fe3O4/γ-Fe2O3 nanocomposites; in other words, there is a canted spin structure. An intermediate layer in the spin-glass state is formed between the core and the shell. The data on structure of core/shell particles are important to understand the properties of nanocomposites, which are of great interest to apply in various fields, including biomedicine.
Original language | English |
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Pages (from-to) | 2167-2172 |
Number of pages | 6 |
Journal | Physics of the Solid State |
Volume | 62 |
Issue number | 11 |
DOIs | |
Publication status | Published - Nov 2020 |
Keywords
- biomedicine
- core/shell
- magnetic composites
- magnetic nanocomposites
- magnetic nanoparticles
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics