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- W4387662439 abstract "In this work, spindle shape α-Fe2O3 nanorods and carbon-coated α-Fe2O3@C nanorods were synthesized using a simple hydrothermal method followed by calcination at a temperature of 600 οC. Morphology, structural, surface, and magnetic properties of the synthesized samples were studied before and after calcination. XRD results prove the formation of a single corundum phase α-Fe2O3 after hydrothermal preparation at 180 οC. The crystallite size of α-Fe2O3 decreases by calcination in contrast with α-Fe2O3@C. Through calcination, meso-size pores were formed as investigated by TEM. These pores are more in α-Fe2O3 nanorods. Using XPS surface analysis, more O-H bonds were found in α-Fe2O3 nanorods. TEM, XPS, and FTIR techniques were used to prove the formation of the Carbon layer on α-Fe2O3@C nanorods. Intensive characterization and the magnetic properties of α-Fe2O3 and α-Fe2O3@C nanorods were also carried out and reported. VSM measurements show an increase in magnetic moment with smaller coercivity and remanence via C-coating and calcination. The Morin transition as investigated using VSM and Mossbauer measurements, appears for pure hematite nanorods after calcination under atmospheric pressure. This transition is suppressed as shown for nanosize particles with c/a of ≥ 2.74 which was also applicable for samples made by other workers." @default.
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- W4387662439 date "2023-10-01" @default.
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- W4387662439 title "Structural, electronic, and magnetic study on hematite nanorods: Effect of carbon coating and annealing temperature" @default.
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- W4387662439 doi "https://doi.org/10.1016/j.jallcom.2023.172551" @default.
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