Correlation between Tc and Lattice Parameters of Novel Superconducting NaxCoO2 yH2O

Details Correlation between Tc and Lattice Parameters of Novel Superconducting NaxCoO2 yH2O Correlation between Tc and Lattice Parameters of Novel Superconducting NaxCoO2 yH2O

2004-08-19

arxiv.org/abs/cond-mat/0408428v1

Physics

Condensed Matter

Superconductivity

2 pages, 2 figures, and 1 table, to be published in J. Phys. Soc. Jpn. 73 (9) with possible minor revisions

Scientific paper

10.1143/JPSJ.73.2590

We synthesized the five batches of the samples of the novel P3 type superconductor, Na$_{x}$(H$_{3}$O)$_{y'}$CoO$_{2}\cdot y''$H$_{2}$O, by the soft chemical process starting from $\alpha$-NaCoO$_{2}$. The chemical and structural properties varied rather widely from batch to batch, with a result that $T_{c}$ varied from 4.6 K to 3.2 K. The magnetic susceptibility above $T_{c}$ shows upturn at low temperature as in the case of the P2 phase. The $T_{c}$ seems to be well correlated to the lattice parameters.

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