The effect of hexadecyltrimethylammonium bromide (CTAB) addition on the crystal structure, morphology,and magnetic properties of co-precipitated hexagonal barium ferrite was investigated. For afixed amount ofsurfactant, different Fe3+concentrations and Fe3+/Ba2+ratios were used to optimize the formation ofsingle-phase barium ferrite particles. The results indicated that the obtained ferrite particles exhibitedcoercivity changes similar to those of superparamagnetic particles with larger than theoreticallycalculated particle sizes. This results from the softening of the material due to the size reduction of thegrains and incorporation of excess barium, localized on the surface of the particles. Therefore, loweringthe energy barrier required to reverse the magnetization was observed, while high magnetizationsaturation was preserved. The precipitation of barium ferrite particles from a surfactant-rich solutionallowed control of BaFe12O19magnetic properties without introducing any modifications inside thecrystal structure.
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Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1039/d0ra01619e
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2020
