Nonlinear magnetic response in ruthenocuprates
arXiv:0804.3188 · doi:10.1140/epjb/e2008-00188-7
Abstract
We have performed an investigation of the nonlinear magnetic response in ruthenocuprates. A negative, diverging-like peak at the main magnetic transition T_N in RuSr2RECu2O8 (RE = Gd, Y) indicates a possible canted antiferromagnetic order. Another well defined feature above T_N points to a blocking of superparamagnetic particles through the T^(-3) dependence of the third harmonic at higher temperatures. Below T_N a nondiverging peak appears, which is strongly affected by the addition of 10% of Cu ions in the RuO2 planes. In RuSr2RE(2-x)Ce(x)Cu2O10 the main magnetic transition T_M is accompanied by two characteristic temperatures in the third harmonic of the ac susceptibility, in agreement with recent studies from uSR and Mossbauer spectroscopy. We find that the spin-spin correlation temperature is the same in both families of ruthenocuprates.
accepted for publication in EPJB
References in corpus (14)
- 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
- Spin Glass Behavior in RuSr2Gd1.5Ce0.5Cu2O10
- Magnetic-Superconducting phase-diagram of Eu2-xCexRuSr2Cu2O10
- Ruthenocuprates RuSr2(Eu,Ce)2Cu2O10: Intrinsic magnetic multilayers
- The possible origin of the higher magnetic phase transition in RuSr2Eu1.5Ce0.5Cu2O10 (Ru-1222)
- Probing a ferromagnetic critical regime using nonlinear susceptibility
- Magnetic Transitions and Ferromagnetic Clusters in RuSr2(Eu,Ce)2Cu2O10+d
- Canted ferromagnetism in RuSrGdCuO
- Resistivity and Thermoelectric power of NaxCoO2 (x =1.0, 0.7 and 0.6) system
- Separation Between Antiferromagnetic and Ferromagnetic Transitions in Ru_1-xCu_xSr_2EuCu_2O_8+d
- Magnetism and Superconductivity in RuM1.5Ce0.5Sr2Cu2O10 (M=Eu and Y)
- The internal magnetic field in superconducting ferromagnets
- Two component butterfly hysteresis in Ru1222 ruthenocuprate