Intrinsic Josephson Effects in the Magnetic Superconductor RuSr2GdCu2O8

Abstract

We have measured interlayer current transport in small sized RuSr2GdCu2O8 single crystals. We find a clear intrinsic Josephson effect showing that the material acts as a natural superconductor-insulator-ferromagnet-insulator-superconductor superlattice. So far, we detected no unconventional behavior due to the magnetism of the RuO2 layers.

4 pages, 5 figures, to appear in Phys. Rev. Lett

References in corpus (6)

• Coupling of two superconductors through a ferromagnet : evidence for a pi-junction
• Coexistence of ferromagnetism and superconductivity in the hybrid ruthenate-cuprate compound RuSr_2GdCu_2O_8 studied by muon spin rotation (μSR) and DC-magnetization
• Antiferromagnetic Order of the Ru and Gd in Superconducting RuSr2GdCu2O8
• On the effect of heterovalent substitutions in ruthenocuprates
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Cited by in corpus (10)

• Proximity effects in superconductor-ferromagnet heterostructures
• Temperature dependence of the bulk energy gap in underdoped Bi-2212: Evidence for the mean-field superconducting transition
• The Ruthenocuprates - Natural Superconductor-Ferromagnet Multilayers
• Critical fields and spontaneous vortex state in the weak-ferromagnetic superconductor RuSr2GdCu2O8
• Spectroscopy of Magnetic Excitations in Magnetic Superconductors Using Vortex Motion
• Lower critical field and intragrain critical current density in the ruthenate-cuprate RuSr${}_2$Gd${}_{1.5}$Ce${}_{0.5}$Cu${}_2$O${}_{10}$
• On the dc Magnetization, Spontaneous Vortex State and Specific Heat in the superconducting state of the weakly ferromagnetic superconductor RuSr${}_2$GdCu${}_2$O${}_8$
• The magnetic state of 1212-type ruthenocuprate in magnetocaloric and magnetoresistivity measurements of polycrystalline samples of RuSr2Gd1-xCexCu2O8 and Ru1-xSr2GdCu2O8
• Superconducting materials - a topical overview
• The characteristics of the superconducting and magnetic phases in the polycrystalline samples of ruthenocuprates of nominal compositions RuSr2GdCu2O8, Ru0.98Sr2GdCu2O8 and Ru0.5Sr2GdCu2.5O8-d