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We investigated the formation of Tl2Ca2Ba2Cu3O10±δ as a function of oxygen pressure and temperature. Our results explain some previous difficulties in forming single-phase Tl2Ca2Ba2Cu3O10±δ and suggest new routes for making bulk and thin-film Tl-Ca-Ba-Cu-O superconductors. In particular, we find that the temperature needed to form Tl2Ca2Ba2Cu3O10±δ can be greatly reduced by using low oxygen pressures during synthesis.
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Ahn et al. (1992) studied this question.
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