Enhanced Superconducting Critical Parameters in a New High-Entropy Alloy Nb_0.34Ti_0.33Zr_0.14Ta_0.11Hf_0.08.

ABSTRACT: The structural and physical properties of the new titanium- and niobium-rich type-A high-entropy alloy (HEA) superconductor Nb0.34Ti0.33Zr0.14Ta0.11Hf0.08 (in at.%) were studied by X-ray powder diffraction, energy dispersive X-ray spectroscopy, magnetization, electrical resistivity, and specific heat measurements. In addition, electronic structure calculations were performed using two complementary methods: the Korringa-Kohn-Rostoker Coherent Potential Approximation (KKR-CPA) and the Projector Augmented Wave (PAW) within Density Functional Theory (DFT). The results obtained indicate that the alloy exhibits type II superconductivity with a critical temperature close to 7.5 K, an intermediate electron-phonon coupling, and an upper critical field of 12.2(1) T. This finding indicates that Nb0.

SUBMITTER: Idczak R 

PROVIDER: S-EPMC10489023 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature