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arXiv · 1306.3024

Combinatorial search of superconductivity in Fe-B composition spreads

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.

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Kui Jin, Richard Suchoski, Sean Fackler, Yi Zhang, Xiaoqing Pan, Richard L. Greene, Ichiro Takeuchi. 2013-06-13. Combinatorial search of superconductivity in Fe-B composition spreads. https://doi.org/10.1063/1.4822435

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