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Stable High-Entropy TiZrHfNbVCrMoMnFeCoNiAl Laves Phase

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Document pages: 7 pages

Abstract: Recent researches in the field of high-entropy materials reveal an intriguing result: the multicomponent systems combining the chemical elements with diverse valencies and radii can form singlephase solid solutions with the structure of intermetallic Laves phases. Here we report the fabrication of hexagonal Laves phase (C14, prototype MgZn2) in duodenary TiZrHfNbVCrMoMnFeCoNiAl alloy. The phase is stable after the thermal treatment at 973 K for 50 hours. To characterize the material, we examine its electrical conductivity and magnetic properties. The measurements reveal that the Laves phase is a Curie-Weiss paramagnet, which demonstrates metallic conduction and a pronounced Kondo-like anomaly at 80 K. Analysis of experimental data as well as ab initio calculations suggests that chemical complexity and compositional disorder cause strong s-d band scattering and thus the rather high density of d-states in the conduction band.

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