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Abstract.A direct observation of the grain-boundary phases for several well-characterized hot-pressed PbMo6S8 samples were made by Auger electron spectroscopy. The surface elemental concentrations are completely different when compared to its bulk composition. The thickness of this altered composition is in the range 100200A gradually increasing with increase in hot-pressing temperature. Also, evidence...
Abstract.With the overall critical current density, Jc, remaining low for PbMo6S8, the addition of 0.3at.% Sn noticeably improved the performance. The enhancement occurs despite the presence of excess Pb and a slightly suppressed Tc. The increase in Jc can be attributed to a better homogeneity with respect to the chemical composition of the samples, which may be as a consequence of Sn substitution...
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