Magneto-Transport Properties of Doped RuSr${}_2$GdCu${}_2$O${}_8$

Abstract

RuSr${}_2$GdCu${}_2$O${}_8$, in which magnetic order and superconductivity coexist with $T_{Magnetic}$$\gg$$T_c$, is a complex material which poses new and important questions to our understanding of the interplay between magnetic and superconducting (SC) order. Resistivity, Hall effect and thermopower measurements on sintered ceramic RuSr${}_2$GdCu${}_2$O${}_8$ are presented, together with results on a broad range of substituted analogues. The Hall effect and thermopower both show anomalous decreases below $T_{Magnetic}$ which may be explained within a simple two-band model by a transition from localized to more itinerant behavior in the RuO${}_2$ layer at $T_{Magnetic}$.

10 pages, 7 figures, submitted to Phys. Rev. B., correspondence to [email protected]

References in corpus (1)

• Decoupled CuO_2 and RuO_2 layers in superconducting and magnetically ordered RuSr_2GdCu_2O_8

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• The magnetic state of 1212-type ruthenocuprate in magnetocaloric and magnetoresistivity measurements of polycrystalline samples of RuSr2Gd1-xCexCu2O8 and Ru1-xSr2GdCu2O8
• Transport, magnetic and superconducting properties of RuSr2RCu2O8 (R= Eu, Gd) doped with Sn
• Magnetotransport of lanthanum doped RuSr2GdCu2O8 - the role of gadolinium