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Synthesis and superconducting critical temperature of YBa2Cu3O7-δ18
Abstract
YBa2Cu3O7-18 (90% O18, 44% O18) has been synthesized from the elements in order to minimize the possibility of preferential substitution at different crystallographic sites. Magnetic-flux exclusion measurements show that the Tc of the substituted material shifts by no more than 0.2 K from the material synthesized with natural-abundance O2. © 1988 The American Physical Society.
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