Author(s)

Keo-Yuan Wu¹, Swe-Kai Chen^2*, Jenn-Ming Wu¹

¹Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu.
²Center for Nanotechnology, Materials Science, and Microsystems (CNMM), National Tsing Hua University, Hsinchu.

Superconducting (SC) in equal molar NbTaTiZr-based high-entropy alloys (HEAs) that were added with Fe, Ge, Hf, Si, and/or V was observed. According to investigation on crystal structure, composition, and the relationship between critical temperature and e/a ratio, as indicated in Matthias’ empirical rule, the main superconducting phase was that enriched with Nb and Ta. The coherence length (ξ) that was calculated from the carrier density reveals that ξvalue has the same order of magnitude of several hundreds of Angstroms as those binary Nb-Ti and Nb-Zr alloys showed.

HEAs, Superconducting, Matthias’ Rule, e/a, NbTaTiZr-Based Alloys, Fe, Ge, Hf, Si, V Addition, Coherence Length, Electrical Carrier Density

Wu, K. , Chen, S. and Wu, J. (2018) Superconducting in Equal Molar NbTaTiZr-Based High-Entropy Alloys. Natural Science, 10, 110-124. doi: 10.4236/ns.2018.103012.