Abstract
Temperature dependencies of the resistance across the interface of superconducting YBa 2Cu 3O 7 and ferromagnetic La 0.7Ca 0.3MnO 3 were investigated in La 0.7Ca 0.3MnO 3/YBa 2Cu 3O 7 double-layer and cross-strip samples. Anomalous resistance behavior, a relatively large resistance value with a superconducting-like transition, was observed in both samples. In the cross-strip sample the voltage signal changed to extremely large negative values in the temperature region of 170–90 K, which was corresponding to the resistance peak in the LCMO strip. A possible explanation is discussed.
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