High-Concentration Na Doping of SrRuO3 and CaRuO3

The Na-doped perovskite-structure ruthenates Sr1–x Na x RuO3 and Ca1–y Na y RuO3 were prepared by high-pressure synthesis, which enables us to go beyond the previously reported Na doping limits and substitute Na for over 50% of the Sr in SrRuO3 and the Ca in CaRuO3. Gradual and systematic changes in...

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Published inInorganic chemistry Vol. 53; no. 9; pp. 4579 - 4584
Main Authors Seki, Hayato, Yamada, Ryuta, Saito, Takashi, Kennedy, Brendan J, Shimakawa, Yuichi
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 05.05.2014
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Summary:The Na-doped perovskite-structure ruthenates Sr1–x Na x RuO3 and Ca1–y Na y RuO3 were prepared by high-pressure synthesis, which enables us to go beyond the previously reported Na doping limits and substitute Na for over 50% of the Sr in SrRuO3 and the Ca in CaRuO3. Gradual and systematic changes in the crystal structures were observed, and the decreases in the Ru–O bond lengths confirmed the Na substitution at the A site caused hole doping to Ru4+ at the B site. In contrast to what has been previously reported, Sr1–x Na x RuO3 showed metallic conductivity. Magnetic properties were influenced by the Na substitution, but no long-range antiferromagnetic behavior was observed in Ca1–y Na y RuO3.
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content type line 23
ISSN:0020-1669
1520-510X
DOI:10.1021/ic500265t