Enhanced superconducting properties in FeCr$_x$Se

Anil K Yadav; Ajay D. Thakur; C V Tomy

doi:10.1016/j.ssc.2011.01.010

Enhanced superconducting properties in FeCr$_x$Se

Superconductivity 2011-04-18 v1 Materials Science

Authors: Anil K Yadav , Ajay D. Thakur , C V Tomy

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Abstract

We report an enhancement of superconducting transition temperature ( $T_{\rm c}$ ) when Chromium (Cr) is substituted in excess at the Iron (Fe) site (FeCr $_x$ Se, $x=$ 0.01, 0.02 and 0.03). There is a corresponding increase in the superconducting volume fraction with $T_{\rm c}$ attaining a value of 11.2 K on 2 $%$ Cr substitution when compared to a $T_{\rm c}$ of 8.5 K for the conventional tetragonal Fe-excess sample Fe $_{1+x}$ Se. The results point to the role of chemical pressure (introduced via ionic size variation at the Fe site upon Cr substitution in excess) on superconducting properties.

Keywords

iron-based superconductor high-temperature superconductivity superconductivity

Cite

@article{arxiv.1011.6519,
  title  = {Enhanced superconducting properties in FeCr$_x$Se},
  author = {Anil K Yadav and Ajay D. Thakur and C V Tomy},
  journal= {arXiv preprint arXiv:1011.6519},
  year   = {2011}
}

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