Auger electron spectroscopy of the air-exposed (Cr0.5Mn0.5)2GaC MAX film surface
Andryushchenko T. A. 1, Lyaschenko S. A. 1, Lukyanenko A. V. 1, Varnakov S. N. 1, Ovchinnikov S. G. 1,2
1Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
2Siberian Federal University, Krasnoyarsk, Russia
Email: ata12@iph.krasn.ru

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We have analyzed chemical bonding of atmospheric oxygen with chromium and manganese on the epitaxial MAX-phase (Cr0.5Mn0.5)2GaC surface using Auger electron spectroscopy combined with ion etching. It was found that the system has a specific anisotropic oxidation where oxygen atoms bind to chromium and manganese ones more actively at the faces of layered MAX phase crystallites in contrast to the (0001) basal plane. At the same time, the dominance of the Mn-O chemical bonding over Cr-O is observed on the latter. Keywords: MAX phases, Auger electron spectroscopy, epitaxial films, ion etching. DOI: 10.61011/TPL.2023.07.56448.19430
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