| Title |
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Ortho-II structure in compounds (A=Er, Nd, Pr, Sm, Yb)
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| Abstract |
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| Oxygen ordering has been investigated in superconducting ABa2Cu3O7-delta ceramic materials with A = Er, Nd, Sm and Yb, as well as in samples of this type with the rate earth A partially substituted by Pr. The critical temperature T(c) was determined as a function of the oxygen deficiency-delta of the compound and the corresponding microstructures were investigated by electron diffraction and electron microscopy. A distinct relationship exists between the width of the 60 K plateau and the ortho II ordering. Our results show that the ortho II ordered phase is the superconducting phase with a characteristic T(c) of 60 K. | |
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| Language |
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English
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| Source (journal) |
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Physica: C: superconductivity. - Amsterdam |
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| Publication |
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Amsterdam : 1992
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| ISSN |
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0921-4534
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| Volume/pages |
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196:3-4(1992), p. 363-368
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| ISI |
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A1992JC73400021
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| Full text (publisher's version - intranet only) |
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