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Unusual Field-Dependence of the Intragrain Superconductive Transition in RuSr2EuCu2O8

B. Lorenz·Y. Y. Xue·R. L. Meng·C. W. Chu
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Abstract

A narrow intragrain phase-lock transition was observed in RuSr2EuCu2O8 under a magnetic field H up to a few Tesla. The corresponding transition temperature, T2, decreases rapidly (about 100 K/T at low fields) with H indicating that the grains of RuSr2EuCu2O8 behave like a Josephson-junction-array instead of a homogeneous bulk superconductor. Our data suggest that the bulk superconducting transition may occur on a length scale well below the grain size of 2 to 6 micrometer.

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B. Lorenz, Y. Y. Xue, R. L. Meng, C. W. Chu. 2001-07-03. Unusual Field-Dependence of the Intragrain Superconductive Transition in RuSr2EuCu2O8. https://doi.org/10.1103/physrevb.65.174503

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