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Publication Citation: Large intrinsic effect of axial strain on the critical current of high-temperature superconductors for electric power applications

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Author(s): Daniel C. van der Laan; John (. Ekin;
Title: Large intrinsic effect of axial strain on the critical current of high-temperature superconductors for electric power applications
Published: January 31, 2007
Abstract: A remarkably large reversible reduction in the critical current of "second generation" high-temperature superconductors for electric power applications has been measured with a new technique over a wide range of mechanical strain. The effect amounts to a 40% reduction in critical current at 1% compressive strain in self-magnetic field, and is symmetric for compressive and tensile strains. The intrinsic effect is measured in highly aligned multigranular YBa2Cu3O7-d coated conductors made by different processes, including superconductors with nanoscale pinning centers. This effect and its magnitude are expected to have a significant impact on power applications and provide a useful new parameter for probing the fundamental nature of current transport in high-temperature superconductors.
Citation: Applied Physics Letters
Volume: 90
Pages: pp. 052506-1 - 052506-3
Keywords: critical current;electro-mechanical properties;high-temperature superconductors;reversible strain effect;Superconductivity;YBCO coated conductors
Research Areas: Electromagnetics
PDF version: PDF Document Click here to retrieve PDF version of paper (102KB)