Combinatorial search of superconductivity in Fe-B composition spreads

Kui Jin; Richard Suchoski; Sean Fackler; Yi Zhang; Xiaoqing Pan; Richard L. Greene; Ichiro Takeuchi

doi:10.1063/1.4822435

Combinatorial search of superconductivity in Fe-B composition spreads

Superconductivity 2013-10-02 v1 Materials Science

Authors: Kui Jin , Richard Suchoski , Sean Fackler , Yi Zhang , Xiaoqing Pan , Richard L. Greene , Ichiro Takeuchi

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Abstract

We have fabricated Fe-B thin film composition spreads in search of possible superconducting phases following a theoretical prediction by Kolmogorov et al.^1 Co-sputtering was used to deposit spreads covering a large compositional region of the Fe-B binary phase diagram. A trace of superconducting phase was found in the nanocrystalline part of the spread, where the film undergoes a metal to insulator transition as a function of composition in a region with the average composition of FeB_2. The resistance drop occurs at 4K, and a diamagnetic signal has also been detected at the same temperature. The superconductivity is suppressible in the magnetic field up to 2 Tesla.

Keywords

high-temperature superconductivity superconductivity iron-based superconductor

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@article{arxiv.1306.3024,
  title  = {Combinatorial search of superconductivity in Fe-B composition spreads},
  author = {Kui Jin and Richard Suchoski and Sean Fackler and Yi Zhang and Xiaoqing Pan and Richard L. Greene and Ichiro Takeuchi},
  journal= {arXiv preprint arXiv:1306.3024},
  year   = {2013}
}

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11 pages, 4 figures

Combinatorial search of superconductivity in Fe-B composition spreads

Abstract

Keywords

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