Superconductivity in the compound system La-Ca(Sr)-Cu-O
- Sampathkumaran, E. V.
- Paulose, P. L.
- Grover, A. K.
- Nagarajan, V.
- Dhar, S. K.
DOIAbstract
DC magnetic susceptibility ( chi ) and electrical resistivity ( rho ) measurements in the compound La<SUB>1.8</SUB>Sr<SUB>0.2</SUB>CuO<SUB>4</SUB> prove the existence of a superconducting phase transition around T<SUB>c</SUB>=36 K in conformity with a recent report (Cava et al., 1987). The compounds La<SUB>2-x</SUB>Ca<SUB>x</SUB>CuO<SUB>4</SUB> (x=0.1, 0.15 and 0.2) exhibit superconductivity at lower temperatures. No correlation is found between T<SUB>c</SUB> and the size of the cation substituted at the La site
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