Superconducting properties of the lithium-substituted YBa2Cu4O8 prepared by the sol-gel method |
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Authors: | S Fujihara H Kozuka T Yoko |
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Affiliation: | (1) Institute for Chemical Research, Kyoto University, Uji, 611 Kyoto-Fu, Japan |
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Abstract: | The effects of the lithium substitution for copper on the properties of the superconducting YBa2Cu4O8 were studied. Single-phase YBa2Cu4–x
LixO8 was successfully prepared by the sol-gel method under ambient pressure over a composition range of 0x 0.08, while impurity phases appeared at x=0.10 and 0.20. The lattice constants of YBa2Cu4–x
Li
x
O8 were almost invariant with increasing lithium content x. The superconducting transition temperature decreased monotonically with increasing x in the range, 0x0.08. The suppression of superconductivity was discussed in terms of the impurity effect in the CuO2 planes. |
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