Ruthenocuprates RuSr2(Eu,Ce)2Cu2O10: Intrinsic magnetic multilayers

Abstract

We report ac susceptibility data on RuSr_2(Eu,Ce)_2Cu_2O_(10-y) (Ru-1222, Ce content x=0.5 and 1.0), RuSr_2GdCu_2O_8 (Ru-1212) and SrRuO_3. Both Ru-1222 (x=0.5, 1.0) sample types exhibit unexpected magnetic dynamics in low magnetic fields: logarithmic time relaxation, switching behavior, and `inverted' hysteresis loops. Neither Ru-1212 nor SrRuO_3 exhibit such magnetic dynamics. The results are interpreted as evidence of the complex magnetic order in Ru-1222. We propose a specific multilayer model to explain the data, and note that superconductivity in the ruthenocuprate is compatible with both the presence and absence of the magnetic dynamics.

9 pages, 11 figures, Revtex; submitted to Phys.Rev.B

References in corpus (6)

• Coexistence of ferromagnetism and superconductivity in the hybrid ruthenate-cuprate compound RuSr_2GdCu_2O_8 studied by muon spin rotation (μSR) and DC-magnetization
• Electronic Raman scattering and photoluminescence from La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$ exhibiting giant magnetoresistance
• An ordered stack of spin valves in a layered magnetoresistive perovskite
• Magnetic and electronic structures of superconducting RuSr${}_2$GdCu${}_2$O${}_8$
• Evidence for Possible Phase-Separations in RuSr2(Gd,Ce)2Cu2O10-delta
• Direct Imaging of the First Order Spin Flop Transition in the Layered Manganite La1.4Sr1.6Mn2O7

Cited by in corpus (17)

• Spin Glass Behavior in RuSr2Gd1.5Ce0.5Cu2O10
• The Ruthenocuprates - Natural Superconductor-Ferromagnet Multilayers
• Magnetic Transitions and Ferromagnetic Clusters in RuSr2(Eu,Ce)2Cu2O10+d
• Magneto-transport study of intra- and intergrain transitions in the magnetic superconductors RuSr2GdCu2O8 and RuSr2(Gd1.5Ce0.5)Cu2O10
• Search for Magnetic Order in Superconducting RuSr2Eu1.2Ce0.8Cu2O10
• Magnetism, Upper critical field and Thermoelectric power of Magneto-Superconductor RuSr2Eu1.5Ce0.5Cu2O10
• Separation Between Antiferromagnetic and Ferromagnetic Transitions in Ru_1-xCu_xSr_2EuCu_2O_8+d
• Lower critical field and intragrain critical current density in the ruthenate-cuprate RuSr${}_2$Gd${}_{1.5}$Ce${}_{0.5}$Cu${}_2$O${}_{10}$
• Magneto-Superconductivity of Rutheno-Cuprates
• Two dimensional frustrated magnetic state in superconducting RuSr2Eu1.5Ce0.5Cu2O10 (Ru-1222)
• Towards universal magnetization curves in the superconducting state of RuSr2GdCu2O8
• Nonlinear magnetic response in ruthenocuprates
• Crossing point phenomena (T* = 2.7 K) in specific heat curves of superconducting ferromagnets RuSr2Gd1.4Ce0.6Cu2O10-δ
• Synthesis and physical characterization of superconductivity-magnetism crossover compound RuSr2EuCeCu2O10
• Anomalous lattice expansion of RuSr2Eu1.5Ce0.5Cu2O10(Ru-1222) magneto superconductor: A low temperature X-ray diffraction study
• Two component butterfly hysteresis in Ru1222 ruthenocuprate
• Low temperature magnetic transition in RuSr2EuCeCu2O10 ruthenocuprate