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The effect of oxygen ordering through controlled exposure to oxygen on the superconductive properties of LaBa2Cu3Oy

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Abstract

In an effort to clarify the role of controlled oxygen exposure in the synthesis of LaBa2Cu3Oy samples which achieve zero resistivity above 90 K, we have prepared samples of La(1+x)Ba(2−x)Cu3Oy with x approximately equal to 0 and with y varying between 6.22 and 7.00. We find that for large values of y, 6.88<y<7.00, the value of the superconductive critical temperature is strongly dependent on synthetic conditions. Synthetic conditions promoting orthorhombic crystal structures consistent with oxygen ordering in the basal planes of the crystal produce materials with the highest values of the zero-resistance temperature.

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  1. Unocal Science and Technology Division, 376 S. Valencia Avenue, 92621, Brea, CA, USA

    S. G. Brass & M. H. Ghandehari

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  1. S. G. Brass
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  2. M. H. Ghandehari
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Brass, S.G., Ghandehari, M.H. The effect of oxygen ordering through controlled exposure to oxygen on the superconductive properties of LaBa2Cu3Oy . Appl. Phys. A 48, 401–404 (1989). https://doi.org/10.1007/BF00618906

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