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- W2023375069 abstract "A series of superconductors GdBa2Cu3−xFexO7−δ have been prepared to study the effect of the substitution of Fe for Cu on the crystal structure, Tc and magnetic properties. For x≤0.07, the substitution of Fe for Cu increases the lattice parameter a, but decreases the lattice parameter b; for x≥0.1, the crystal structure changes from an orthorhombic to a tegragonal structure. Mössbauer studies reveal that for x=0.05 most of the Fe dopants are at Cu(1) sites, while for x=0.2 a substantial proportion of Fe dopants might be at Cu(2) sites. Tc decreases with increasing Fe concentration. The rapid drop in Tc for x≥0.1 is attributed to significant increase in the number of Fe dopants at Cu(2) sites. The magnetic behavior above Tc follows the Curie-Weiss law and the effective average magnetic moment decreases as the Fe concentration is increased." @default.
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- W2023375069 date "1989-06-01" @default.
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- W2023375069 title "Crystal structure, Tc, magnetic properties and Mössbauer spectrum of Fe-doped GdBa2Cu3O7−δ" @default.
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- W2023375069 doi "https://doi.org/10.1016/0921-4534(89)90368-7" @default.
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