Articles you may be interested inCarrier tuned rectifying-like behavior in superconducting La1.8Sr0.2CuO4/La1.9Sr0.1CuO4 bilayers Appl.Stability of superconducting La1.8Sr0.2CaCu2O6 with respect to oxygen partial pressure Critical current, critical field, and carrier density measurements have been made on bulk samples of Lal.8 Sr 02 Cu0 4 to assess the potential of such oxide superconductors for practical applications. The importance of preparing samples in a high oxygen pressure was documented. The upper critical field at T = 0 was estimated to be 530 kOc. From magnetization hysteresis loops, critical current densities were determined between 0 and 60 kOe. At 60 kOe, the values were 2x 10 3 A/cm 2 at 4.2 K and 4X 10 2 A/cm 2 at 18 K in samples that exhibited characteristics of weak flux pinning. The effective carrier density at 48 K was 1 X 10 21 cm -J, approximately half of the expected upper limit. A set of microscopic superconducting parameters has been derived from transition temperature, resistivity, and upper and lower critical field measurements made on a single specimen.
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