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

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

2008-07-16

arxiv.org/abs/0807.2530v2

Phys. Rev. B 78, 092406 (2008)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.78.092406

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.

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