The influence of apical oxygen on the increase of Tc in YBa 2Cu3O7-x

E. Dul'kin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The direct current (DC) bulk resistance and acoustic emission of YBa 2Cu3O7-x ceramic samples have simultaneously been measured during heating in a temperature region of 400-700 K. Near 560 K, an anomaly of p, accompanied by an acoustic emission, has been observed. After this anomaly p reached a lower value than had previously been measured. The observed p decrease and acoustic emission signals confirm that YBa 2Cu3O7-x ceramic samples absorb oxygen during heating in the temperature region of 500-600 K, as shown by previous dilatometric measurements (Dul'kin 2001 J. Superconductivity 14 497). It is shown that absorbed oxygen atoms enter O4 apical oxygen sites and are able to increase the Tc in YBa2Cu3O7-x material.

Original languageAmerican English
Pages (from-to)954-956
Number of pages3
JournalSuperconductor Science and Technology
Issue number7
StatePublished - Jul 2004


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