Physics – Condensed Matter – Superconductivity
Scientific paper
2005-11-19
J. Appl. Phys., 99 (2006) 08M501
Physics
Condensed Matter
Superconductivity
3 pages (4 figs. incl.), reported at 50th Magnetism and Magnetic Materials Conference, San Jose, CA, USA, 2005
Scientific paper
Resistivity, thermoelectric power, heat capacity and magnetization for samples of RuSr_2(Gd_{1.5}Ce_{0.5})Cu_{2}O_{10-\delta} 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.
Agnolet G.
Anatska M. P.
Belevtsev B. I.
Felner Israel
Krasovitsky V. B.
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