Inhomogeneous Superconducting Properties of La2-xSrxCuOyExcept forx∼0.16,y∼4.0
- 15 September 1990
- journal article
- letter
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 59 (9) , 3073-3076
- https://doi.org/10.1143/jpsj.59.3073
Abstract
The ac susceptibility was measured for the powdered samples of La 2- x Sr x CuO y with various Sr and oxygen contents. Only the sample with a composition of x ∼0.16 and y ∼4.0 shows a sharp superconducting transition at 38 K having the maximum value of the Meissner volume fraction f of more than 80% of the ideal value. The samples with the other concentrations have broad transitions at lower transition temperatures with smaller f , while the onset temperature of the Meissner effect was observed to be independent of x and y , and close to 38 K, suggesting that only the compound with x ∼0.16 and y ∼4.0 shows intrinsic superconductivity in this system.Keywords
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