Coexistence of Superconductivity and Magnetism in Ruthenocuprates
The layered ruthenocuprate materials RuSr2LnCu2O8 and RuSr2(Ln1+xCe1-x)Cu2O10, with Ln=lanthanide or Y for both structures, consist of pairs of CuO2 planes alternating with perovskite-like sheets of vertex sharing RuO6 octahedra. Samples of Ru-1212 and Ru-1222 materials were known to show both superconducting and magnetic transitions. Here, we discuss the problem of the coexistence, considering a model which includes two types of carriers responsible separately for the ordered phases. By considering the interplay between a hybridization mechanism and the direct exchange coupling between these carriers, we look at the stability of the coexisting phase assuming an inhomogeneous superconducting phase.
Pietro VINCENZINI, Vojislav V. MITIC, Alois LOIDL and Dino FIORANI
M. Cuoco et al., "Coexistence of Superconductivity and Magnetism in Ruthenocuprates ", Advances in Science and Technology, Vol. 67, pp. 182-191, 2010