Preparation and electrical properties of Eu(II)xNb(IV)O2+x.
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概要
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Nonstoichiometric compounds, Eu<I><SUB>x</SUB></I>NbO<SUB>2+<I>x</I></SUB>, were prepared. A cubic tungsten bronze type structure was found in the single phase region of Eu<I><SUB>x</SUB></I>NbO<SUB>2+<I>x</I></SUB> (0.5≤<I>x</I>≤1.0). Magnetic susceptibility measurements showed that the oxidation state of europium in the bronzes was bivalent. The Eu<I><SUB>x</SUB></I>NbO<SUB>2+<I>x</I></SUB> was a metallic conductor in the temperature range 4.2–300 K. Thermoelectromotive force measurements (100–350 K) indicated that the charge carriers were electrons and that the effective mass of the electrons increased with decreasing <I>x</I> in Eu<I><SUB>x</SUB></I>NbO<SUB>2+<I>x</I></SUB>.
- 公益社団法人 日本化学会の論文
著者
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Adachi Gin-ya
Department Of Applied Chemistry Faculty Of Engineering Osaka University
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Ishikawa Kenji
Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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Shiokawa Jiro
Department of Applied Chemistry, Faculty of Engineering, Osaka University
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