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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
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Abstract

In high-quality c-axis-oriented MgB2 thin films, we observed high critical current densities (Jc) of 16 MA/cm^2 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 40 MA/cm^2. For a magnetic field of 5 T, a Jc of 0.1 MA/cm^2 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.

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Hyeong-Jin Kim, W. N. Kang, Eun-Mi Choi, Mun-Seog Kim, Kijoon H. P. Kim, Sung-Ik Lee. 2001-06-28. High current-carrying capability in c-axis-oriented superconducting MgB2 thin films. https://doi.org/10.1103/physrevlett.87.087002

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