Superconductivity in a New High-Entropy Alloy (NbTi)$$_{0.67}$$(MoHfV)$$_{0.33}$$

Abstract

AbstractThe structural and superconducting properties of a new niobium- and titanium-rich high-entropy alloy (NbTi)$$_{\text {0.67}}$$ 0.67 (MoHfV)$$_{\text {0.33}}$$ 0.33 were determined. The alloy was synthesized by arc melting and its physical properties were characterized by means of X-ray powder diffraction, energy dispersive X-ray spectroscopy, magnetization, electrical resistivity and specific heat measurements. Experimental data revealed that the (NbTi)$$_{\text {0.67}}$$ 0.67 (MoHfV)$$_{\text {0.33}}$$ 0.33 crystalizes in body-centered cubic structure and exhibits type-II superconductivity below about 5 K. In addition, electronic structure calculations were performed using the Density Functional Theory (DFT) method. Their results suggest that in case of HEAs, the influence of the local atomic configuration on their electronic structure in the energy region close to E$$_{\mathrm {\text {F}}}$$ F is rather small or even negligible.