Accurate oxygen-content determination method for decreased sample amounts of superconductive and other functional oxides

Yukiko Yasukawa*, Hisao Yamauchi, Maarit Karppinen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

In a conventional wet-chemical redox analysis applied to the determination of oxygen contents of nonstoichiometric functional oxides such as superconductive copper oxides, the sample amount required for a single experiment is typically 50-100 mg. Here we demonstrate that an improved coulometric titration method works to precisely analyze oxygen contents of decreased amounts of various complex oxides containing, e.g., copper, cobalt, or iron at mixed valence values. The improved titration method is found to yield the oxygen content of the YBa2Cu3O7-δ reference sample with high reproducibility, i.e., Δδ<0.01, for samples with a mass of only ∼10mg.

Original languageEnglish
Pages (from-to)502-504
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number3
DOIs
Publication statusPublished - 15 Jul 2002
MoE publication typeA1 Journal article-refereed

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