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

doi:10.7566/JPSJ.83.113707

Synchrotron X-ray diffraction study of structural phase transition in Ca₁₀(Ir₄As₈)(Fe_2-xIrxAs₂)₅

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

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

We report on the structural phase transition found in Ca₁₀(Ir₄As₈)(Fe_2-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 language	English
Article number	113707
Journal	journal of the physical society of japan
Volume	83
Issue number	11
DOIs	https://doi.org/10.7566/JPSJ.83.113707
Publication status	Published - Nov 15 2014
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.7566/JPSJ.83.113707

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

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.",

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

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T1 - Synchrotron X-ray diffraction study of structural phase transition in Ca10(Ir4As8)(Fe2-xIrxAs2)5

AU - Katayama, Naoyuki

AU - Sugawara, Kento

AU - Sugiyama, Yuki

AU - Higuchi, Takafumi

AU - Kudo, Kazutaka

AU - Mitsuoka, Daisuke

AU - Mizokawa, Takashi

AU - Nohara, Minoru

AU - Sawa, Hiroshi

PY - 2014/11/15

Y1 - 2014/11/15

N2 - 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.

AB - 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.

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Synchrotron X-ray diffraction study of structural phase transition in Ca₁₀(Ir₄As₈)(Fe_2-xIrxAs₂)₅

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