High current-carrying capability in c-axis-oriented superconducting MgB2 thin films

Details High current-carrying capability in c-axis-oriented superconducting MgB2 thin films High current-carrying capability in c-axis-oriented superconducting MgB2 thin films

2001-05-18

arxiv.org/abs/cond-mat/0105363v2

Phys. Rev. Lett. 87, 087002 (2001).

Physics

Condensed Matter

Superconductivity

3 pages and 4 figures, to be published in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.87.087002

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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