Superconductivity with high upper critical field in an equiatomic high entropy alloy Sc-V-Ti-Hf-Nb

• DOI: 10.48550/arxiv.2404.17363
• Publication Date: 2024-04-26
• Authors: S. Jangid; P. K. Meena; R. K. Kushwaha; S. Srivastava; P. K. Manna; P. Mishra; S. Sharma; R. P. Singh
• Keywords: Critical field; High-Entropy Alloys

High-entropy alloy (HEA) superconductors have attracted significant attention due to their exceptional low-temperature mechanical and superconducting properties. We report the synthesis thorough characterization of an equiatomic HEA superconductor with composition Sc$_{0.20}$V$_{0.20}$Ti$_{0.20}$Hf$_{0.20}$Nb$_{0.20}$, crystallizing in a body-centered cubic crystal structure (Im3$\bar{m}$). Our investigation, using magnetization, transport, heat capacity measurements, reveals presence weakly coupled, fully gapped superconductivity transition temperature 4.17(3) K upper critical field exceeding Pauli paramagnetic limit. The metallic nature, combined high field, positions it as promising candidate for applications devices.