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- W2892017153 abstract "Fe3O4 nanoparticles were successfully synthesized by the sol-gel explosion-assisted method. The phase composition of products with different ratios of dry gel and explosive agent (3:1, 6:1, 12:1) was studied. Highly pure, well-crystallized, spherical and monodispersed Fe3O4 3–20 nm nanoparticles were obtained at the 12:1 ratio. X-ray photoelectron spectroscopy characterization of the as-synthesized nanoparticles demonstrated consistency with stoichiometric Fe3O4 surface composition. Zero-field cooled and field cooled measurements at 200 Oe validate that the anisotropy energy is greater than thermal energy up to 300 K for the ∼10 nm samples. The Verwey transition (metal-insulator) of magnetite nanoparticles takes place at 128 K (Tv). The effects of different temperatures of 5 K, 128 K, and 300 K on magnetic behavior were studied in detail. The results show that hysteresis behavior weakens as the temperature increases. Saturation magnetization (Ms) of 86.2 emu/g is the highest at Tv. Initial susceptibility (χα) increases as a function of temperature, whereas coercivity (Hc) decreases." @default.
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- W2892017153 date "2019-01-01" @default.
- W2892017153 modified "2023-10-03" @default.
- W2892017153 title "Temperature effects on magnetic properties of Fe3O4 nanoparticles synthesized by the sol-gel explosion-assisted method" @default.
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- W2892017153 doi "https://doi.org/10.1016/j.jallcom.2018.09.238" @default.
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