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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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
Volume83
Issue number11
DOIs
Publication statusPublished - Nov 15 2014

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iridium
synchrotrons
superconductivity
diffraction
x rays
transition temperature
shift
symmetry
ions
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Synchrotron X-ray diffraction study of structural phase transition in Ca10(Ir4As8)(Fe2-xIrxAs2)5 . / Katayama, Naoyuki; Sugawara, Kento; Sugiyama, Yuki; Higuchi, Takafumi; Kudo, Kazutaka; Mitsuoka, Daisuke; Mizokawa, Takashi; Nohara, Minoru; Sawa, Hiroshi.

In: Journal of the Physical Society of Japan, Vol. 83, No. 11, 113707, 15.11.2014.

Research output: Contribution to journalArticle

Katayama, Naoyuki ; Sugawara, Kento ; Sugiyama, Yuki ; Higuchi, Takafumi ; Kudo, Kazutaka ; Mitsuoka, Daisuke ; Mizokawa, Takashi ; Nohara, Minoru ; Sawa, Hiroshi. / Synchrotron X-ray diffraction study of structural phase transition in Ca10(Ir4As8)(Fe2-xIrxAs2)5 In: Journal of the Physical Society of Japan. 2014 ; Vol. 83, No. 11.
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AU - Higuchi, Takafumi

AU - Kudo, Kazutaka

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