The formation of infinite-layer cuprates and correlation with temperature and partial pressure of oxygen

Chia-Jyi Liu, S. Koriyama, H. Yamauchi

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Abstract

Various combinations of calcination temperature and oxygen partial pressures have been investigated to stabilize the infinite-layer structure in Ca1-xSrxCuO2 and (Ca1-x-yYy)SrxCuO2 systems using a solid-state reaction method. It is found that the stability of infinite-layer structure for different compositions strongly depends on the calcination conditions. The infinite-layer structure is stable in the range of 0.12 ≤ x ≤ 0.16 for Ca1-xSrxCuO2 at the calcination conditions of 940°C and 3% partial pressure of oxygen, and also in the range of 0.08 ≤ x ≤ 0.12 at the calcination conditions of 1020°C and 1 atm of flowing oxygen. The solubility limit extends to the range of 0.10 ≤ x ≤ 0.20 for y = 0.02 in Ca1-x-yYySrxCuO2 prepared at 940°C under 3% partial pressure of oxygen.

Original languageEnglish
Pages (from-to)395-401
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume215
Issue number3-4
DOIs
Publication statusPublished - 1993 Oct 1

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All Science Journal Classification (ASJC) codes

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

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