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Paper detail

Structural Features of Layered Iron Pnictide Oxides (Fe2As2)(Sr4M2O6)

Structural features of newly found perovskite-based iron pnictide oxide system have been systematically studied. Compared to REFePnO system, perovskite-based system tend to have lower Pn-Fe-Pn angle and higher pnictogen height owing to low electronegativity of alkaline earth metal and small repulsive force between pnictogen and oxygen atoms. As-Fe-As angles of (Fe2As2)(Sr4Cr2O6), (Fe2As2)(Sr4V2O6) and (Fe2Pn2)(Sr4MgTiO6) are close to ideal tetrahedron and those pnictogen heights of about 1.40 A are close to NdFeAsO with optimized carrier concentration. These structural features of this system may leads to realization of high Tc superconductivity.

preprint2010arXivOpen access
H. OginoS. SatoY. MatsumuraN. KawaguchiK. UshiyamaY. KatsuraS. HoriiK. KishioJ. Shimoyama
cond-mat.supr-con
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H. OginoS. SatoY. MatsumuraN. KawaguchiK. UshiyamaY. KatsuraS. HoriiK. KishioJ. Shimoyama

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