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- W1977076284 abstract "The variation of the superconducting properties with the Sr concentration y in R1−xPrxBa2−ySryCu3O7 can be accounted for by taking the following two factors into consideration: mutual substitution of the Sr and Pr ions on each other's sites and local structural changes arising from the substitution. The former decreases the Pr concentration on the R/Pr site, while the latter modify the energy of a hole on the Cu, O and Pr sites (through the changes in the Madelung potential) and the hopping interaction between them (through the changes in the bond length), thereby affecting the ability of the Pr ions to localize a hole. It is argued that the 2D percolation model we proposed to explain the properties of R1−xPrxBa2Cu3O7 is applicable to the Sr-doped system. Possible explanations are also given of several problems regarding the behaviour of Pr ions in high-Tc, as well as insulating, cuprates, including the ionic size effect on TN (the magnetic ordering temperature of Pr moments) in the related systems, e.g. Tl(Ba1−xSrx)2PrCu2O7, Nb(Ba1−xSrx)2PrCu2O8 and PrBa2−xPrxCu3O7." @default.
- W1977076284 created "2016-06-24" @default.
- W1977076284 creator A5034595841 @default.
- W1977076284 creator A5072925741 @default.
- W1977076284 date "1995-11-01" @default.
- W1977076284 modified "2023-09-28" @default.
- W1977076284 title "On the Sr substitution effect in the R1−xPrxBa2−ySryCu3O7 system (R = rare-earth element)" @default.
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- W1977076284 doi "https://doi.org/10.1016/0921-4534(95)00524-2" @default.
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