Cu-site doping effects, transport and magnetic properties of high-Tc oxides and their hole concentration dependence

H. Harashina, T. Nishikawa, T. Kiyokura, S. Shamoto, M. Sato, K. Kakurai

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54 Citations (Scopus)

Abstract

Doping effects have been studied by using La2-ySryCu1-χMχO4 (M = Zn, Ni and Mg) and YBa2(Cu1-χZnχ)3O6+y. The rate of Tc-suppression, |dTc/dχ|, is found to be inversely proportional to the carrier concentration p. The disappearance of the superconductivity with Cu-site doping seems to be primarily due to the loss of the itinerant nature of the holes, which is supported by the variation of the spectral function χ(ω) of the magnetic excitations with temperature, studied by neutron scattering on YBa2(Cu0.965Zn0.035)3O6.75. The peak of Hall coefficient versus T curves and the "spin gap" effect found in the T-dependence of the resistivities ρ{variant} become less significant with Zn-doping.

Original languageEnglish
Pages (from-to)142-150
Number of pages9
JournalPhysica C: Superconductivity and its applications
Volume212
Issue number1-2
DOIs
Publication statusPublished - 1993 Jul 1

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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