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2. Chemical Interaction and Electronic Structure in a Compositionally Complex Alloy: a Case Study by means of X-ray Absorption and X-ray Photoelectron Spectroscopy

Author

Kasatikov, S., Fantin, A., Manzoni, A. M., Sakhonenkov, S., Makarova, A., Smirnov, D., Filatova, E. O., and Schumacher, G.

Subjects
Condensed Matter - Materials Science, Physics - Chemical Physics
Abstract

Chemical interaction and changes in local electronic structure of Cr, Fe, Co, Ni and Cu transition metals (TMs) upon formation of an $Al_{8}Co_{17}Cr_{17}Cu_{8}Fe_{17}Ni_{33}$ compositionally complex alloy (CCA) have been studied by X-ray absorption spectroscopy and X-ray photoelectron spectroscopy. It was found that upon CCA formation, occupancy of the Cr, Co and Ni 3d states changes and the maximum of the occupied and empty Ni 3d states density shifts away from Fermi level ($E_f$) by 0.5 and 0.6 eV, respectively, whereas the Cr 3d empty states maximum shifts towards $E_f$ by 0.3 eV, compared to the corresponding pure metals. The absence of significant charge transfer between the elements was established, pointing to the balancing of the 3d states occupancy change by involvement of delocalized 4s and 4p states into the charge redistribution. Despite the expected formation of strong Al-TMs covalent bonds, the Al role in the transformation of the TMs 3d electronic states is negligible. The work demonstrates a decisive role of Cr in the Ni local electronic structure transformation and suggests formation of directional Ni-Cr bonds with covalent character. These findings can be helpful for tuning deformation properties and phase stability of the CCA.

Published
2020

14. Koronaranomalien

Author

Schumacher, G., Schumacher, Gebhard, editor, Hess, John, editor, and Bühlmeyer, Konrad, editor

Published
2008
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17. Klinische Untersuchung

Author

Schumacher, G., Brodherr-Heberlein, S., Schumacher, Gebhard, editor, Hess, John, editor, and Bühlmeyer, Konrad, editor

Published
2008
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19. Einführung

Author

Schumacher, G., Schreiber, R., Schumacher, Gebhard, editor, Hess, John, editor, and Bühlmeyer, Konrad, editor

Published
2008
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22. Röntgenuntersuchung

Author

Schumacher, G., Martinoff, S. A., Schumacher, Gebhard, editor, Hess, John, editor, and Bühlmeyer, Konrad, editor

Published
2008
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34. T

Author

Fink, S., Hermelinh, S., Marx, H. J., Seidel, W., Kross, S., Lange, W.-D., Bröcker, M., Suchla, B. R., Pfleiderer, M., Busch-Salmen, G., Platen, E., Brügmann, N., Schumacher, G., Cadenbach, R., Massenkeil, G., Jung, H., Kühn, C., Zaminer, F., Feder, G., Kube, M., Bourligueux, G., Frisius, R., Czesla, W., Schmidt, H.-Ch., Altenburg, D., Dickreiter, M., Schürmann, H. G., Hammerstein, R., Hucke, H., Loos, H., Schomberg, C., Höfele, B., Goslich, S., Cappelli, M., Aurbek, G., Langrock, K., Fischer, W., Schlager, K., Schäfer, H. J., and Massenkeil, Günther, editor

Published
1998
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43. Politiek: Zweten, fronsen en walgen

Author

Schumacher, G., Bakker, B., Rooduijn, M., Homan, M., Challenges to Democratic Representation (AISSR, FMG), and Political Communication & Journalism (ASCoR, FMG)

Abstract

Om de pakweg vier jaar gebruiken we onze vingers en handen om te stemmen. In Nederland gebeurt dat nog altijd met een stempotlood. We stemmen dus met ons lichaam, zou je kunnen zeggen. Maar hoe verhoudt dat stemgedrag zich precies tot de geest? Het Hot Politics Lab biedt inzicht in de eigenaardige wisselwerking tussen onderbuik en verstand.

Published
2021

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