TY - JOUR
T1 - Water content and superconductivity in Na0.3CoO 2·yH2O
AU - Cmaidalka, J.
AU - Baikalov, A.
AU - Xue, Y. Y.
AU - Meng, R. L.
AU - Chu, C. W.
N1 - Funding Information:
The authors would like to thank Y.Y. Sun for X-ray analysis. This work is supported in part by NSF grant no. DMR-9804325, the T.L.L. Temple Foundation, the John J. and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity and Advanced Materials at the University of Houston; and at Lawrence Berkeley Laboratory by the Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering of the US Department of Energy under contract no. DE-AC03-76SF00098.
PY - 2004/4/1
Y1 - 2004/4/1
N2 - We report here the correlation between the water content and superconductivity in Na0.3CoO2·yH2O under the influences of elevated temperature and cold compression. The X-ray diffraction of the sample annealed at elevated temperatures indicates that intergrowths may exist in the compound at equilibrium when 0.6s varies linearly with y, but is insensitive to the intergrowth, indicative of quasi-2D superconductivity. The Tc-onset, especially, shifts only slightly with y. Our data from cold compressed samples, on the other hand, show that the water loss non-proportionally suppresses the diamagnetization, which is suggestive of weak links.
AB - We report here the correlation between the water content and superconductivity in Na0.3CoO2·yH2O under the influences of elevated temperature and cold compression. The X-ray diffraction of the sample annealed at elevated temperatures indicates that intergrowths may exist in the compound at equilibrium when 0.6s varies linearly with y, but is insensitive to the intergrowth, indicative of quasi-2D superconductivity. The Tc-onset, especially, shifts only slightly with y. Our data from cold compressed samples, on the other hand, show that the water loss non-proportionally suppresses the diamagnetization, which is suggestive of weak links.
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U2 - 10.1016/j.physc.2003.11.008
DO - 10.1016/j.physc.2003.11.008
M3 - Article
AN - SCOPUS:1542304802
SN - 0921-4534
VL - 403
SP - 125
EP - 131
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 3
ER -