Structural changes and redistribution of holes in Ca-doped YBa2Cu4O8

Pedro Berastegui, Masato Kakihana, Sten G. Eriksson, Shigeru Nishio, Hiromasa Mazaki, Hiroshi Yasuoka, Minoru Osada, Masatomo Yashima, Masahiro Yoshimura

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)


The crystal structure of (Y1-xCax)Ba2Cu4O8 at room temperature has been refined by Rietveld analysis of time-of-flight (TOF) neutron powder diffraction data. The largest changes upon Ca doping involve the O(2) and O(3) ions in the Cu(2)O2 plane which move towards the Ba ion, while the Cu(2)-Cu(2) plane distance decreases. The complex magnetic susceptibility measurements have shown that the superconducting transition temperature, Tc increases from 81.3 K for x=0.0 to 89.9 K for x=0.1. Calculation of Madelung energies based upon the structural data has shown that the number of holes in the conducting Cu(2)O2 plane increases with increasing Ca content, which is qualitatively consistent with the observed increase in Tc.

頁(從 - 到)377-378
期刊Physica C: Superconductivity and its applications
發行號PART 1
出版狀態Published - 1994 十二月

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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