Fabrication of grain boundary junctions using NdFeAs(O,F) superconducting thin films

Taito Omura; Takuya Matsumoto; Takafumi Hatano; Kazumasa Iida; Hiroshi Ikuta

doi:10.1088/1742-6596/1054/1/012024

Fabrication of grain boundary junctions using NdFeAs(O,F) superconducting thin films

Superconductivity 2018-08-02 v2

Authors: Taito Omura , Takuya Matsumoto , Takafumi Hatano , Kazumasa Iida , Hiroshi Ikuta

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Abstract

We report on the growth of NdFeAs(O,F) thin films on [001]-tilt MgO bicrystal substrates with misorientation angle theta_GB=6{\deg}, 12{\deg}, 24{\deg} and 45{\deg}, and their inter- and intra-grain transport properties. X-ray diffraction study confirmed that all our NdFeAs(O,F) films are epitaxially grown on the MgO bicrystals. The theta_GB dependence of the inter-grain critical current density Jc shows that, unlike Co-doped BaFe2As2 and Fe(Se,Te), its decay with theta_GB is rather significant. As a possible reason of this result, fluorine may have diffused preferentially to the grain boundary region and eroded the crystal structure.

Keywords

grain boundary junctions ndfeas(o,f) superconducting thin films mgO bicrystal critical current density epitaxial growth

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@article{arxiv.1712.05966,
  title  = {Fabrication of grain boundary junctions using NdFeAs(O,F) superconducting thin films},
  author = {Taito Omura and Takuya Matsumoto and Takafumi Hatano and Kazumasa Iida and Hiroshi Ikuta},
  journal= {arXiv preprint arXiv:1712.05966},
  year   = {2018}
}

Comments

Proceedings of the 30th International Symposium on Superconductivity, 7 figures. Accepted for publication

Fabrication of grain boundary junctions using NdFeAs(O,F) superconducting thin films

Abstract

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