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- W3209791799 abstract "An aqueous solution containing polyvinyl alcohol, calcium nitrate and ferric nitrate was electrospun to yield smooth nanocomposite fibers with diameter in the range of 160 nm. As-synthesized nanofibers were heat treated at different temperatures ranging from 400 to 1000 °C to remove the organic matter and induce crystallization of CaFe2O4. Room temperature X-ray diffraction studies showed that CaFe2O4 nanowires existed in single phase cubic structure in as-spun nanofibers heat treated up to 500 °C. However, a slow transformation of cubic spinel nanostructure to orthorhombic nanostructure was observed when heat treated above 500 °C. The sample heat treated at 1000 °C for 8 h yielded a single phase orthorhombic CaFe2O4 nanowires. Magnetization curves recorded at low temperatures indicated superparamagnetic behavior in cubic CaFe2O4 nanowires. Superparamagnetism persisted in cubic samples obtained by heat treated as-spun nanofibers up to 500 °C. As-spun nanofibers heat treated at 500 °C exhibited superparamagnetic characteristics with saturation magnetization of 18.45 emu/g whereas nanofibers heat treated at 1000 °C exhibited ferrimagnetic nature with saturation magnetization of 2.19 emu/g." @default.
- W3209791799 created "2021-11-08" @default.
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- W3209791799 date "2022-01-01" @default.
- W3209791799 modified "2023-09-26" @default.
- W3209791799 title "Structural transition and associated magnetic properties of heat treated electrospun one-dimensional CaFe2O4" @default.
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- W3209791799 doi "https://doi.org/10.1016/j.cplett.2021.139169" @default.
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