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Recent progress in Chevrel phase syntheses: a new low temperature synthesis of the superconducting lead compound

Authors
Rabiller, P.
Rabiller-Baudry, M.
Even-Boudjada, S.
Burel, L.
Chevrel, R.
Sergent, M.
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Published in Materials Research Bulletin. 1994, vol. 29, no. 5, p. 567-574
Abstract This paper reviews recent progress in the synthesis of Chevrel phases. The objective was to produce better microscopic homogeneity of the elements and/or precursors required to form the phase. Among these new processes, the one dealing with insertion of lead into the binary Mo₆S₈ compound is particularly attractive for the development of Chevrel phase wire since the phase formation occurs at temperature as low as 440°C. To achieve good microscopic homogeneity of PbMo₆S₈ (PMS), PbS is used and the extra sulfur is removed under a hydrogen gas flow. Basic superconducting properties, like a.c. susceptibility transition and specific heat anomaly at Tc, demonstrate extremely fine super-conducting particles. Further annealing at the moderate temperature of 600°C improves the homogeneity and/or the crystallinity of the powder.
Keywords Chevrel phasesSulfidesLead
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RABILLER, P. et al. Recent progress in Chevrel phase syntheses: a new low temperature synthesis of the superconducting lead compound. In: Materials Research Bulletin, 1994, vol. 29, n° 5, p. 567-574. https://archive-ouverte.unige.ch/unige:115085

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Deposited on : 2019-03-18

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