OXYGEN DEFICIENCY δ AND ITS EFFECT ON Tc IN SUPERCONDUCTING Y1Ba2 Cu3O7-δReport as inadecuate




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Abstract : Y3+ ion is substituted with Ca2+ ion in Y1Ba2Cu3O7-δ, where the ionic radii of both ions are almost the same. The substitution does not change the average valence of Cu ion, but the amount of oxygen deficiency δ increases linearly with x up to x = 0.15. Crystal structure, critical temperature Tc, magnetization, δ, electrical resistivity, and Hall effect were measured for the Ca system, and an abrupt increase in Hall mobility µ was observed at δ = 0.56 corresponding to the sharp change of δ there.





Author: K. Iguchi Y. Soga K. Ando T. Saito K. Shinagawa T. Tsushima

Source: https://hal.archives-ouvertes.fr/



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