  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 new Ru1-xRexSr2GdCu2Oy ruthenocupratetype family,
adapting the known two-step process (double perovskite + CuO)by directly doping
the double perovskite, thus obtaining the new perovskite compound
Sr2GdRu1-xRexOy, which represents a new synthesis process to the best of our
knowledge. Our samples were structurally characterised through X-ray
diffraction, and the patterns were analysed via Rietveld refinement. A complete
magnetic characterisation 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) sublattices can clearly be observed.
