Commentary on the superconducting and magnetic properties of the ruthenocuprates

Presented in this commentary is a short discussion of the superconducting and magnetic properties of selected compounds of ruthenocuprates, with an emphasis given to the RuSr2GdCu2O8 compound. The ruthenocuprates, which form derivative class in the cuprate family, continue raising interest for there evidenced presence of magnetic ordering in the sublattice of Ru ions, which in polycrystalline samples of RuSr2GdCu2O8 sets at Tm ≈ 132 K, and at low temperatures may become simultaneous with the superconducting phase (Tc,max ≈ 50 K)-all that in the crystal structure derived from well known REBa2Cu3O7 cuprate superconductor. While several here invoked recent results advocate for an intrinsically inhomogeneous nucleation of superconductivity within this structure, the formed superconducting phase carries potential of maintaining substantial anisotropy with then interesting consequence for probing the cuprate characteristic superconductivity in these compounds. PACS Codes: 74.72.-h, 74.25.Ha, 74.81.-g