Superconductivity at 41.0 K in the F-doped LaFeAsO1-xFx

Details Superconductivity at 41.0 K in the F-doped LaFeAsO1-xFx Superconductivity at 41.0 K in the F-doped LaFeAsO1-xFx

2008-04-23

arxiv.org/abs/0804.3725v1

Solid State Communications 148 (2008), pp. 168-170

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1016/j.ssc.2008.07.032

Here we report the superconductivity in the LaFeAsO1-xFx system prepared by high pressure synthesis. The highest onset superconducting transition temperature (Tc) in this La-based system is 41.0 K with the nominal composition of LaFeAsO1-xFx (x = 0.6), which is higher than that reported previously by ambient pressure synthesis. The increase of Tc can be attributed to the further shrinkage of crystal lattice that causes the stronger chemical pressure on the Fe-As plane, which is induced by the increased F-doping level under high pressure synthesis.

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