Lightweight 3d-element-rich high-entropy alloy superconductor with high critical field and current density
S. Jangid, P. K. Meena, R. K. Kushwaha, S. Srivastava, P. Manna, S. Sharma, P. Mishra, R. P. Singh
DOI 10.1103/x7zw-xvgh · Physical Review Materials
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Abstract
The lightweight high-entropy alloy represents an innovative class of multicomponent systems that combine low density with the exceptional mechanical properties of high-entropy alloys. We present a detailed synthesis and investigation of a 3d rich equiatomic high entropy alloy superconductor Sc-Ti-V-Nb-Cu, which crystallizes in a body-centered cubic structure. Magnetization, electrical resistivity, and heat capacity measurements confirm weakly coupled bulk type II superconductivity with a transition temperature of 7.21(3) K and an upper critical field of 12.9(1) T close to the Pauli paramagnetic limit. Its remarkably high critical current density of 1.812(1)×105 A-cm−2 exceeds practical requirements. The combination of low-density, moderate transition temperature, high upper critical field, and large critical current density positions Sc-Ti-V-Nb-Cu as a promising candidate for next-generation superconducting device applications.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sc0.20Ti0.20V0.20Nb0.20Cu0.20 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.32 | Pressure not reported | zero_resistance |
| Sc0.20Ti0.20V0.20Nb0.20Cu0.20 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.21 | Pressure not reported | onset |
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