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Synthesis Of High Magnetization Feco Alloys Prepared By A Modified Polyol Process, Zachary J. Huba, Kyler J. Carroll, Everett E. Carpenter

Chemistry Publications

High magnetization, soft ferromagnetic FeCo alloy nanoparticles were synthesized at various Fe to Co ratios using a modified polyol process. Transmission electron microscopy images revealed that Fe-rich particles had a cubic shape with a mean particle size of 100 nm, while Co-rich particles had a spherical shape. A maximum saturation magnetization of 212 emu/g was recorded for both Fe₆₀Co₄₀ and Fe₇₅Co₂₅ particles. X-ray diffraction scans at room temperatureof synthesized particles were characteristic of body-centered-cubic single-phase FeCo. Variabletemperature x-ray diffraction scans under N₂ gas revealed an order–disorder transition at 600 °C and a transition …