A New Superconducting Phase of Sodium Cobalt Oxide

A new superconducting sodium cobalt oxide (see Figure, left) has been synthesized through soft‐chemical modification using α‐NaCoO2 as a parent compound, in place of the γ‐Na0.7CoO2 used to make the first cobalt oxide superconductor (see Figure, right). A three‐layer periodicity of the CoO2 stacking...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2004-11, Vol.16 (21), p.1901-1905
Main Authors: Takada, K., Sakurai, H., Takayama-Muromachi, E., Izumi, F., Dilanian, R. A., Sasaki, T.
Format: Article
Language:English
Subjects:
Superconductivity
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Summary:A new superconducting sodium cobalt oxide (see Figure, left) has been synthesized through soft‐chemical modification using α‐NaCoO2 as a parent compound, in place of the γ‐Na0.7CoO2 used to make the first cobalt oxide superconductor (see Figure, right). A three‐layer periodicity of the CoO2 stacking sequence exists in the present material, in contrast to a two‐layer one in the previous. The new oxide has a superconducting transition at 4.6 K.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200400756