Tc-suppression mechanism of Pr-doping in (R, Pr)Ba2Cu3O7

K. Kodama, S. Shamoto, H. Harashina, M. Sato, M. Nishi, K. Kakurai

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5 Citations (Scopus)

Abstract

Neutron inelastic measurements on Y0.52Pr0.48Ba2Cu3O7 have been carried out. From the magnetic excitation spectra X″(q, ω), it is found that the reduction of the hole-carrier concentration p and the randomness effects introduced by the substitution of Y with Pr suppress the superconductivity. Based on the hole-trapping model, the origin of the randomness effects can be explained. The R-ion-size dependence of the suppression rate of the superconducting transition temperature, |dTc/d x|, can also be explained qualitatively. By measuring the Hall coefficients RH of R1-xPrxBa2Cu3O7 (R = Yb, Y, Gd and Sm), |d p /d x| is found to be insensitive to the species of R. For RBa2Cu3O7 (without Pr atoms), p decreases with increasing R-ion-size, which presents another possible explanation of the R-ion-size dependence of |dTc/d x|.

Original languageEnglish
Pages (from-to)333-335
Number of pages3
JournalPhysica C: Superconductivity and its applications
Volume263
Issue number1-4
DOIs
Publication statusPublished - 1996 May

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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