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Local Ordering Study of Nanostructured FeCo-C Alloys for Various Fe Contents
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- Authors
- Yong Goo Yoo, Dong Seok Yang, Bingzhi Jiang, Seong Cho Yu, J. M. Greneche
- Issue Date
- 2006-06
- Citation
- Journal of the Korean Physical Society, v.48, no.6, pp.1463-1467
- ISSN
- 0374-4884
- Publisher
- 한국물리학회 (KPS)
- Language
- English
- Type
- Journal Article
- Abstract
- Nanostructured $({m Fe}_x {m Co}_{1-x})_{75}{m C}_{25}$ alloys were prepared by mechanical alloying. Local ordering around the central atom was examined for various Fe contents by using extended X-ray absorption fine structure. X-ray diffraction patterns indicate a cohenite-like phase for composition of $x$ = 0.2, 0.5, and 0.8. The first 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 fitted to a (FeCo)$_3$C 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.
- KSP Keywords
- C phase, Extended X-ray Absorption Fine Structure, Fe content, Mechanical alloying(MA), X-ray absorption fine structure(XAFS), X-ray diffraction pattern, local ordering, temperature dependence