Homologous series of iron pnictide oxide superconductors „Fe2As2…

摘要

We have discovered homologous series of iron pnictide superconductors u0002Fe2As2u0003nu0002u0004Can+1u0002Sc,Tiu0003nOyu0005u0002n=3,4,5u0003. These compounds have extremely thick blocking layers up tonquintuple perovskite layers sandwiched by the Fe2As2 layers. These samples exhibited bulknsuperconductivity with relatively high Tc up to 42 K. The relationship between Tc and the iron-planeninterlayer distance suggested that Tc of the iron based superconductor is basically determined by thenlocal structure of Fe2As2 layer. © 2010 American Institute of Physics. u0004doi:10.1063/1.3478850