Physics – Condensed Matter – Superconductivity
Scientific paper
2005-06-13
Published in: Supercond. Sci. Technol. 18 (2005) 798-804
Physics
Condensed Matter
Superconductivity
9 pages, 7 figures
Scientific paper
10.1088/0953-2048/18/6/002
Samples of the Ru1-xFexSr2GdCu2O8 system with x = 0, 0.025, 0.05, 0.075, 0.1 and 0.2, were prepared and their structural, superconducting and magnetic properties were studied. Rietveld refinement of the X-ray diffraction patterns show that the Fe substitution occurs in both Ru and Cu sites. An increase of Fe concentration produces no significant changes in the bond angle Ru-O(3)-Ru, which is a measure of the rotation of the RuO6 octahedra around the c-axis, and also in the bond angle Ru-O(1)-Cu, which is a measure of the canting of the RuO6 octahedra. On the other hand, the bond angle Cu-O(2)-Cu, which is a measure of the buckling of the CuO2 layer, has a slight tendency to decrease with the increase of the Fe content. We found thet both ferromagnetic and superconducting transition temperatures are reduced with the increase of Fe concentration. Analisys related to the decay of the superconducting and ferromagnetic states is presented.
Akachi T.
Escamilla R.
Go'mez Roberto
Morales Farisa
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