All-MgB2 Josephson tunnel junctions

K. Ueda; S. Saito; K. Semba; T. Makimoto; M. Naito

doi:10.1063/1.1920411

All-MgB2 Josephson tunnel junctions

Superconductivity 2009-11-10 v1 Materials Science

Authors: K. Ueda , S. Saito , K. Semba , T. Makimoto , M. Naito

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Abstract

Sandwich-type all-MgB2 Josephson tunnel junctions (MgB2/AlOx/MgB2) have been fabricated for the first time with as-grown MgB2 films formed by molecular beam epitaxy. The junctions exhibit substantial superconducting current (IcRN product ~ 0.8 mV at 4.2K), a well-defined superconducting gap (delta = ~2.3 mV), and clear Fraunhofer patterns. The superconducting gap voltage of delta agrees well with the smaller gap in the multi-gap scenario. The results demonstrate that MgB2 has great promise for superconducting electronics that can be operated at T ~ 20 K.

Keywords

josephson junctions mgb2 superconductivity superconducting tunnel junctions

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@article{arxiv.cond-mat/0412345,
  title  = {All-MgB2 Josephson tunnel junctions},
  author = {K. Ueda and S. Saito and K. Semba and T. Makimoto and M. Naito},
  journal= {arXiv preprint arXiv:cond-mat/0412345},
  year   = {2009}
}

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9 pages, 3 figures

All-MgB2 Josephson tunnel junctions

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