The magnetic property of CoFe2O4 assembly by the gradient magnetic field

Xian, Zhang; Kan, Xucai; Wang, Min; Rao, R. Gowri Shankar; Zheng, Ganhong; Wang, Meiling; Ma, Yongqing

doi:10.1016/j.jcrysgro.2021.126131

Cited by 3 publications

(1 citation statement)

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“…Micrometer-sized cobalt ferrite rods were obtained by thermal decomposition at 400–700 °C of a CoFe 2 (C 2 O 4 ) 3 precursor prepared by a solvothermal reaction [ 41 ]. There is only one work in which small (several nm) isotropic cobalt ferrite NPs were assembled into rod-like microaggregates during the thermal decomposition of iron(III) and cobalt(II) acetylacetonates in oleic acid, oleylamine, and a benzyl ether at 200 °C under the gradient magnetic field [ 42 ]. However, those microaggregates did not represent single crystals but were composed of individual spherical NPs.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Ferrite Nanorods Synthesized with a Facile “Green” Method in a Magnetic Field

Kwiatkowski,

Shvets,

Timchenko

et al. 2024

Nanomaterials

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We report a new facile method for the synthesis of prolate cobalt ferrite nanoparticles without additional stabilizers, which involves a co-precipitation reaction of Fe3+ and Co2+ ions in a static magnetic field. The magnetic field is demonstrated to be a key factor for the 1D growth of cobalt ferrite nanocrystals in the synthesis. Transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman spectroscopy are applied to characterize the morphology and structure of the obtained nanoparticles. According to TEM, they represent nanorods with a mean length of 25 nm and a diameter of 3.4 nm that have a monocrystalline structure with characteristic plane spacing of 2.9 Å. XRD and Raman spectroscopy confirm the spinel CoFe2O4 structure of the nanorods. After aging, the synthesized nanorods exhibit maximum saturation magnetization and coercivity equal to 30 emu/g and 0.3 kOe, respectively. Thus, the suggested method is a simple and “green” way to prepare CoFe2O4 nanorods with high aspect ratios and pronounced magnetic properties, which are important for various practical applications, including biomedicine, energy storage, and the preparation of anisotropic magnetic nanocomposites.

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Section: Introductionmentioning

confidence: 99%