| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1487938 | Materials Research Bulletin | 2015 | 8 Pages |
•We investigated the effect of the dilution of magnetic Ru sub-lattice of RuSr2GdCu2O8.•We synthesized the doped compound RuixRexSr2GdCu2Oy, for 3%, 6%, 9% and 12% Re.•Re would affect the electron coupling: just 3 and 6% samples were superconductor.•Superconductivity emergence strongly affects magnetic properties of 3 and 6% samples.•A weak ferromagnetic component is consistent with a globally antiferromagnetic system.
Despite the discovery of new superconductors classes, high-Tc oxides continue to be a current topic, because of their complex phase diagrams and doping-dependant effects (allowing one to investigate the interaction between orbitals), as well as structural properties such as lattice distortion and charge ordering, among many others. Ruthenocuprates are magnetic superconductors in which the magnetic transition temperature is much higher than the critical superconducting temperature, making them unique compounds. With the aim of investigating the dilution of the magnetic Ru sub-lattice, we proposed the synthesis of the Ru1−xRexSr2GdCu2Oy ruthenocuprate-type family, adapting the known two-step process (double perovskite + CuO) by directly doping the double perovskite, thus obtaining the perovskite compound Sr2GdRu1−xRexOy, which represents a new synthesis process to the best of our knowledge. Our samples were structurally characterized through X-ray diffraction, and the patterns were analysed via Rietveld refinement. A complete magnetic characterization as a function of temperature and applied field, as well as transport measurements were carried out. We discuss our results in the light of the two-lattice model for ruthenocuprates, and a relation between RuO2 (magnetic) and CuO2 (superconductor) sub-lattices can clearly be observed.
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