Impurity Effects on the Superconducting Transition Temperature of NazCoO2.yH2O

Details Impurity Effects on the Superconducting Transition Temperature of NazCoO2.yH2O Impurity Effects on the Superconducting Transition Temperature of NazCoO2.yH2O

2003-12-10

arxiv.org/abs/cond-mat/0312242v1

J. Phys. Soc. Jpn. 73 (2004) No.5 1297.

Physics

Condensed Matter

Superconductivity

10 pages, 14 figures,submitted to J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.73.1297

Superconducting transition temperature Tc of NazCo1-xMxO2.yH2O has been studied for M=Ir and Ga, which can substitute for Co. It has been found that Tc is suppressed by the M-atom doping. The decreasing rates |dTc/dx| are of the order of 1 K/% and too small to be explained by the pair breaking mechanism for the anisotropic order parameters by non-magnetic impurities. Brief arguments are given on possible origins of the Tc suppression.

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