Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs

Details Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs

2008-03-29

arxiv.org/abs/0803.4283v1

Materials Research Innovations 12, 105, (2008)

Physics

Condensed Matter

Superconductivity

4 pages

Scientific paper

10.1179/143307508X333686

Since the discovery of copper oxide superconductor in 1986 [1], extensive efforts have been devoted to the search of new high-Tc superconducting materials, especially high-Tc systems other than cuprates. The recently discovered quaternary superconductor La[O1-xFx]FeAs with the superconducting critical transition Tc of 26 K [2], which has a much simple layered structure compared with cuprates, has attracted quick enthusiasm and is going to become a new high-Tc system [3-6]. Here we report the discovery of bulk superconductivity in the praseodymium-arsenide oxides Pr[O1-xFx]FeAs with an onset drop of resistivity as high as 52 K, and the unambiguous zero-resistivity and Meissner transition at low temperature, which will place these quaternary compounds to another high-Tc superconducting system explicitly.

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