Synchrotron X-ray diffraction study of structural phase transition in Ca10(Ir4As8)(Fe2-xIrxAs2)5

Naoyuki Katayama, Kento Sugawara, Yuki Sugiyama, Takafumi Higuchi, Kazutaka Kudo, Daisuke Mitsuoka, Takashi Mizokawa, Minoru Nohara, Hiroshi Sawa

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6 Citations (Scopus)


We report on the structural phase transition found in Ca10(Ir4As8)(Fe2-xIrxAs2)5, which exhibits superconductivity at 16 K. The c-axis parameter is doubled below a structural transition temperature of approximately 100 K, while the tetragonal symmetry with the space group P4/n (No. 85) is unchanged at all temperatures measured. Our synchrotron X-ray diffraction study clearly shows iridium ions at a non-coplanar position shift along the z-direction at the structural phase transition. We discuss the fact that iridium displacements affect superconductivity in Fe2As2 layers.

Original languageEnglish
Article number113707
Journaljournal of the physical society of japan
Issue number11
Publication statusPublished - 2014 Nov 15
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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