2016/05/23 by Debashis Mondal, Mondal, Debashis, Soma Banik +17
Engineering · Physics and Astronomy · #Advanced Chemical Physics Studies #Advanced Materials Characterization Techniques #FOS: Physical sciences #Intermetallics and Advanced Alloy Properties #Materials Science (cond-mat.mtrl-sci)
paper · pdf · doi:10.48550/arxiv.1605.06967
openalex publication_date 2016/05/23 · openalex created_date 2022/10/05 · openalex updated_date 2026/07/28
Resonant photoemission spectroscopy has been used to investigate the\ncharacter of Fe 3d states in FeAl alloy. Fe 3d states have two different\ncharacter, first is of itinerant nature located very close to the Fermi level,\nand second, is of less itinerant (relatively localized character), located\nbeyond 2 eV below the Fermi level. These distinct states are clearly\ndistinguishable in the resonant photoemission data. Comparison between the\nresults obtained from experiments and first principle based electronic\nstructure calculation show that the origin of the itinerant character of the Fe\n3d states is due to the ordered B2 structure, whereas the relatively less\nitinerant (localized) Fe 3d states are from the disorders present in the\nsample. The exchange splitting of the Fe 3s core level peak confirms the\npresence of local moment in this system. It is found that the itinerant\nelectrons arise due to the hybridization between Fe 3d and Al 3s-3p states.\nPresence of hybridization is observed as a shift in the Al 2p core-level\nspectra as well as in the X-ray near edge absorption spectra towards lower\nbinding energy. Our photoemission results are thus explained by the\nco-existence of ordered and disordered phases in the system.\n