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arXiv · cond-mat/0511489

Transport, thermal and magnetic properties of RuSr_2(Gd_{1.5}Ce_{0.5})Cu_2O_{10-δ}, a magnetic superconductor

D. G. Naugle·K. D. D. Rathnayaka·V. B. Krasovitsky·B. I. Belevtsev·M. P. Anatska·G. Agnolet·I. Felner
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Abstract

Resistivity, thermoelectric power, heat capacity and magnetization for samples of RuSr_2(Gd_{1.5}Ce_{0.5})Cu_{2}O_{10-δ} were investigated in the temperature range 1.8-300 K with a magnetic field up to 8 T. The resistive transitions to the superconducting state are found to be determined by the inhomogeneous (granular) structure, characterized by the intragranular, T_{c0}, and intergranular, T_{cg}, transition temperatures. Heat capacity, C(T), shows a jump at the superconducting transition temperature T_{c0}\approx 37.5 K. A Schottky-like anomaly is found in C(T) below 20 K. This low temperature anomaly can be attributed to splitting of the ground term $^{8}S_{7/2}$ of paramagnetic Gd^{3+} ions by internal and external magnetic fields.

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D. G. Naugle, K. D. D. Rathnayaka, V. B. Krasovitsky, B. I. Belevtsev, M. P. Anatska, G. Agnolet, I. Felner. 2005-11-19. Transport, thermal and magnetic properties of RuSr_2(Gd_{1.5}Ce_{0.5})Cu_2O_{10-δ}, a magnetic superconductor. https://doi.org/10.1063/1.2163276

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