Single composite crystal structure analysis of incommensurate spin-ladder compound Sr2.5Ca11.5Cu24O41

Y. Gotoh, H. Fujihisa, S. Takeya, H. Yamawaki, J. Akimitsu

Research output: Contribution to journalArticlepeer-review

Abstract

Single-crystal X-ray structure analysis of mutually incommensurate (Sr 0.36Ca1.64Cu2O3) 0.706CuO2, "Sr2.5Ca11.5Cu 24O41" has been performed on the basis of superspace group approach. The lattice constants of (Sr0.36Ca 1.64Cu2O3)0.706CuO2 are a = 1.1298(1), b = 1.2582(1), c1=0.2750(1)nm for the CuO2 part and a = 1.1298(1), b = 1.2582(1), c2=0.3897(1)nm for the (Sr0.36Ca1.64Cu2O3) one. From the average structure analysis, it has been expected that the formation of CuO 5 with pyramidal coordination by O atoms occurs in the Cu 2O3 ladder. The minimum distance between Cu atom in the Cu2O3 ladder and O atom in the CuO2 chain has clearly shown that O in the CuO2 acts as apical oxygen to form the CuO5 coordination. It has been concluded that (Sr 0.36Ca1.64Cu2O3) 0.706CuO2 bears a marked structural resemblance to the cuprate High Tc superconductors.

Original languageEnglish
Pages (from-to)S219-S220
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - Dec 1 2010
Externally publishedYes

Keywords

  • Composite crystal
  • Ladder cuprate
  • SrCaCuO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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