High-Temperature Superconductivity in Eu0.5K0.5Fe2As2

Subsequent to our recent report of SDW type transition at 190 K and antiferromagnetic order below 20 K in EuFe2As2, we have studied the effect of K-doping on the SDW transition at high temperature and AF order at low temperature. 50% K doping suppresses the SDW transition and in turn gives rise to h...

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Published in:arXiv.org 2008-08
Main Authors: Jeevan, H S, Hossain, Z, Kasinathan, Deepa, Rosner, Helge, Geibel, C, Gegenwart, P
Format: Article
Language:English
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Summary:Subsequent to our recent report of SDW type transition at 190 K and antiferromagnetic order below 20 K in EuFe2As2, we have studied the effect of K-doping on the SDW transition at high temperature and AF order at low temperature. 50% K doping suppresses the SDW transition and in turn gives rise to high-temperature superconductivity below T_c = 32 K, as observed in the electrical resistivity, AC susceptibility as well as magnetization. A well defined anomaly in the specific heat provides additional evidence for bulk superconductivity.
ISSN:2331-8422
DOI:10.48550/arxiv.0807.2530