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arXiv · 1607.00953

Robustness of superconductivity to competing magnetic phases in tetragonal FeS

Franziska K. K. Kirschner·Franz Lang·Craig V. Topping·Peter J. Baker·Francis L. Pratt·Sophie E. Wright·Daniel N. Woodruff·Simon J. Clarke·Stephen J. Blundell
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Abstract

We have determined the superconducting and magnetic properties of a hydrothermally synthesized powder sample of tetragonal FeS using muon spin rotation (μSR). The superconducting properties are entirely consistent with those of a recently published study, showing fully gapped behavior and giving a penetration depth of λ_{ab} = 204(3) nm. However, our zero-field μSR data are rather different and indicate the presence of a small, non-superconducting magnetic phase within the sample. These results highlight that sample-to-sample variations in magnetism can arise in hydrothermally prepared phases, but interestingly the superconducting behavior is remarkably insensitive to these variations.

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Franziska K. K. Kirschner, Franz Lang, Craig V. Topping, Peter J. Baker, Francis L. Pratt, Sophie E. Wright, Daniel N. Woodruff, Simon J. Clarke, Stephen J. Blundell. 2016-07-04. Robustness of superconductivity to competing magnetic phases in tetragonal FeS. https://doi.org/10.1103/physrevb.94.134509

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