Rutheno-Cuprates: The Superconducting Ferromagnets

Magnetism, upper critical field and thermoelectric power of the magnetosuperconductor RuSr2Eu1.5Ce0.5Cu2O10−δ

“…Most probably they arise from the superstructures of the tilted RuO 6 octahedra of the system[9,16,22]. The lattice parameters and quality of the XRD pattern is similar to earlier reported data for various Ru-1222 compounds[1,2,[14][15][16][17]. Ru-1222 compounds are structurally related to the CuA 2 QCu 2 O 7−δ [Cu-1 (A) 2 (Q) 12 or Cu-1212, e.g.…”

“…An x-ray diffraction (XRD) pattern for the oxide is shown in figure 1. It is to be noted that a few unidentified lines are also seen in the XRD pattern, namely at 2θ of nearly 28 [15][16][17]. The oxygen content of the present sample is not determined, but it must be in line with our previous works (see [28]) in which we showed an oxygen content close to 9.60 for Ru-1222 samples having their T c close to 30 K and no T c with an oxygen content lower than say 9.40.…”

“…However, later works by Bernhard et al [12] and Tokunaga et al [13] showed that superconductivity exists in this compound within a magnetically ordered state. A few substantial review articles/book chapters are also available on these ruthenocuprate magnetosuperconductors [14][15][16][17].…”

Synthesis and physical characterization of superconductivity–magnetism crossover compound RuSr2EuCeCu2O10−δ

“…Magneto-superconductivity of rutheno-cuprates viz. RuSr 2 (Ln,Ce)Cu 2 O 10-δ (Ru-1222) [3] and RuSr 2 LnCu 2 O 8-δ (Ru-1212) [4] is currently an area of intense research and also a rich field for topical reviews [5][6][7]. The mainstay of the current research seems to be centered around the magnetic state of these compounds and the dramatic changes in magnetic behavior that take place on cooling below the room temperature.…”