Subramanian, M. A. ; Torardi, C. C. ; Gopalakrishnan, J. ; Calabrese, J. C. ; Morrissey, K. J. ; Askew, T. R. ; Flippen, R. B. ; Chowdhry, U. ; Sleight, A. W. ; Lin, J. J. ; Poon, S. J. (1988) New oxide superconductors Physica C: Superconductivity, 153-155 . pp. 608-612. ISSN 0921-4534
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4...
Related URL: http://dx.doi.org/10.1016/0921-4534(88)90728-9
Abstract
Crystals of the new high temperature superconductor Bi2Sr3-xCaxCu2O8+y have been grown and studied. Single crystal x-ray diffraction data were used to determine a pseudo tetragonal structure based on an A-centered orthorhombic cell with a = 5.399Å,b= 5.414Å,and c= 30.904Å. The structure contains the copper-oxygen sheets as in La2CuO4 and YBa2Cu3O7, but the copper-oxygen chains present in YBa2Cu3O7 do not occur in Bi2Sr3-xCaxCu2O8+y. Electrical measurements on our single crystals show a resistivity drop at about 116 K and apparent zero resistivity at 91 K. We find superconductivity at 120 K in the Tl/Ca/Ba/Cu/O system. Also, we have for the first time prepared phases of the type La2-xNaxCuO4. These materials are superconducting with Tc's as high as 40 K, and they have some unusual magnetic behavior starting at about 10 K.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 12305 |
| Deposited On: | 10 Nov 2010 06:32 |
| Last Modified: | 03 Jun 2011 05:12 |
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