ISSN:
1432-0630
Keywords:
74.60.-w
;
74.60.Mj
;
74.70.-b
;
74.70.Fi
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract With the overall critical current density,J c , remaining low for PbMo6S8, the addition of 0.3 at. % Sn noticcably improved the performance. The enhancement occurs despite the presence of excess Pb and a slightly suppressedT c . The increase inJ c 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 in the lattice. Detailed calorimetric investigation of undoped PbMo6S8 showed aT c distribution down to 9 K evidenced by a smearing ofT c . This may be due to a progressive degradation of the sample quality leading to a plausible off-stoichiometry. High-resolution Auger electron spectroscopic experiments suggest a variation in composition indicating excellent correspondence with the specific heat data. However, no such deviation was detected for the Sn-doped samples and therefore the observed raise inJ c . The results are discussed in conjunction with oxygen, lead and tin incorporated PbMo6S8.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01542872
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