Superconductivity with high upper critical field in Ta-Hf alloys
P. K. Meena, S. Jangid, R. K. Kushwaha, R. P. Singh
DOI 10.1103/PhysRevMaterials.7.084801 · Physical Review Materials
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Abstract
High upper-critical field superconducting alloys are required for superconducting device applications. In this paper, we extensively characterized the structure and superconducting properties of alloys TaxHf1−x (x = 0.2, 0.4, 0.5, 0.6 and 0.8). The substitution of Hf (TC = 0.12 K, type-I superconductor) with Ta (TC = 4.4 K, type-I superconductor) shows an anomalous enhancement of TC with a variation of composition. Interestingly, all compositions exhibited strongly coupled bulk type-II superconductivity with a high upper critical field.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ta0.2Hf0.8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.5 | Pressure not reported | unknown |
| Ta0.4Hf0.6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.6 | Pressure not reported | unknown |
| Ta0.5Hf0.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.1 | Pressure not reported | unknown |
| Ta0.6Hf0.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.7 | Pressure not reported | unknown |
| Ta0.8Hf0.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.6 | Pressure not reported | unknown |
| Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.4 | Pressure not reported | unknown |
| Hf Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.12 | Pressure not reported | unknown |
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