title: High current-carrying capability in c-axis-oriented superconducting MgB2 thin films.
abstract: In high-quality c-axis-oriented MgB2 thin films, we observed high critical current densities ( J(c)) of approximately 16 MA/cm(2) at 15 K under self-fields comparable to those of cuprate high-temperature superconductors. The extrapolated value of J(c) at 5 K was estimated to be approximately 40 MA/cm(2). For a magnetic field of 5 T, a J(c) of approximately 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.
authors.affiliation: National Creative Research Initiative Center for Superconductivity, Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: H J
authors.initials: HJ
authors.lastname: Kim
authors.forename: W N
authors.initials: WN
authors.lastname: Kang
authors.forename: E M
authors.initials: EM
authors.lastname: Choi
authors.forename: M S
authors.initials: MS
authors.lastname: Kim
authors.forename: K H
authors.initials: KH
authors.lastname: Kim
authors.forename: S I
authors.initials: SI
authors.lastname: Lee