Jpn. J. Appl. Phys. 33 (1994) pp. L581-L582  |Next Article|  |Table of Contents|
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Observation of Distinct Metallic Conductivity in NaCo₂O₄

Tomoaki Tanaka, Shin Nakamura and Shuichi Iida

(Received February 28, 1994; accepted for publication March 19, 1994)

Electrical conductivity and powder X-ray studies have been made on (Sr_1-αNa_[α])CoO _x after firing at 980°C in air. The data are explainable in terms of the mixed phase of SrCoO _x (x∼2.5) and NaCo₂O₄. We found a distinct metallic conductivity in NaCo₂O₄; the resistivity decreases linearly to 12 K from room temperature. This compound may be another candidate mother oxide for future study of high-temperature superconductivity.

KEYWORDS: NaCo₂O₄, Sr_1-αNa_αCoO_x, SrCoO_x, metallic conductivity, magnetic susceptibility, superconductivity of oxides
URL: http://jjap.ipap.jp/link?JJAP/33/L581/
DOI: 10.1143/JJAP.33.L581

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