A comparative study of superconducting LaBa2Cu3O7−δ and La3−xBa3+xCu6O14+δ
In: Ganapathi, L and Ganguli, AK and Ram, Mohan RA and Rao, CNR (1988) A comparative study of superconducting LaBa2Cu3O7−δ and La3−xBa3+xCu6O14+δ. In: Journal of Solid State Chemistry, 73 (2), 1988, S. 593-598
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Zugriff:
Based on X-ray diffraction and electron microscopy it is shown that oxides of the general formula La Ba2Cu3O7−δ become tetragonal when δ deviates slightly from 0. This tetragonal structure is similar to that of La3−xBa3+xCu6O14+δ, with a cubic perovskite subcell and triple periodicity. Electron micrographs of these tetragonal oxides show 90° microdomains. Orthorhombic LaBa2Cu3O7−δ with high Tc (not, vert, similar77 K) is found only when δ reverse similar, equals 0; this sample is subject to formation of twins. Fluorine substitution seems to favor superconductivity.
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A comparative study of superconducting LaBa2Cu3O7−δ and La3−xBa3+xCu6O14+δ
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Autor/in / Beteiligte Person: | Ganapathi, L ; Ganguli, AK ; Ram, Mohan RA ; Rao, CNR |
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Zeitschrift: | Ganapathi, L and Ganguli, AK and Ram, Mohan RA and Rao, CNR (1988) A comparative study of superconducting LaBa2Cu3O7−δ and La3−xBa3+xCu6O14+δ. In: Journal of Solid State Chemistry, 73 (2), 1988, S. 593-598 |
Veröffentlichung: | Elsevier science, 1988 |
Medientyp: | academicJournal |
DOI: | 10.1016/0022-4596(88)90154-5 |
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