Interplay between superconductivity and magnetism in K-doped EuFe2As2

Anupam; P. L. Paulose; H. S. Jeevan; C. Geibel; Z. Hossain

doi:10.1088/0953-8984/21/26/265701

Interplay between superconductivity and magnetism in K-doped EuFe2As2

Superconductivity 2009-06-26 v1

Authors: Anupam , P. L. Paulose , H. S. Jeevan , C. Geibel , Z. Hossain

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Abstract

Superconductivity is found in 50% K-doped EuFe2As2 sample below 33 K. Our results of electrical resistivity, magnetic susceptibility and 57Fe and 151Eu Mossbauer spectroscopy provide clear evidence that the ordering of the Fe moments observed at 190 K in undoped EuFe2As2 is completely suppressed in our 50% K doped sample, thus there is no coexistence between the Fe magnetic order and the superconducting state. However, short range ordering of the Eu moments is coexisting with the superconducting state below 15 K. A bump in the susceptibility well below Tc as well as a slight broadening of the Fe Mossbauer line below 15 K evidence an interplay between the Eu magnetism and the superconducting state.

Keywords

iron-based superconductor doped magnetic materials high-temperature superconductivity

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@article{arxiv.0812.1131,
  title  = {Interplay between superconductivity and magnetism in K-doped EuFe2As2},
  author = {Anupam and P. L. Paulose and H. S. Jeevan and C. Geibel and Z. Hossain},
  journal= {arXiv preprint arXiv:0812.1131},
  year   = {2009}
}

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7 pages, 6 figures

Interplay between superconductivity and magnetism in K-doped EuFe2As2

Abstract

Keywords

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