High Current-Carrying Capability in c-Axis-Oriented Superconducting MgB2 Thin Films
Hyeong-Jin Kim, W. N. Kang, Eun-Mi Choi, Mun-Seog Kim, Kijoon H. P. Kim, Sung-Ik Lee
DOI 10.1103/PhysRevLett.87.087002 · Physical Review Letters
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Abstract
In high-quality c-axis-oriented MgB2 thin films, we observed high critical current densities ( Jc) of ∼16MA/cm2 at 15 K under self-fields comparable to those of cuprate high-temperature superconductors. The extrapolated value of Jc at 5 K was estimated to be ∼40MA/cm2. For a magnetic field of 5 T, a Jc of ∼0.1MA/cm2 was detected at 15 K, suggesting that this compound would be a very promising candidate for practical applications at high temperature and lower power consumption. The vortex-glass phase is considered to be a possible explanation for the observed high current-carrying capability.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39 | Pressure not reported | onset |
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