Local Ordering Study of Nanostructured FeCo-C Alloys for Various Fe Contents

Nanostructured (FexCo1¡x)75C25 alloys were prepared by mechanical alloying. Local ordering around the central atom was examined for various Fe contents by using extended X-ray absorption .ne structure. X-ray diraction patterns indicate a cohenite-like phase for composition of x = 0.2, 0.5, and 0.8. The .rst shell of the Fourier transformed spectra changed with Fe content, indicating a change in the local ordering around the central Fe or Co atom. The x = 0.5 composition was well .tted to a (FeCo)3C phase, and the interatomic distance between the central atom and neighboring atoms was determined. The temperature dependence of magnetization was also studied for various Fe contents.0 KCI Citation Count: 2