Abstract
Since the discovery of the high Tc superconductors, V3Si and Nb3Sn in 1953,1 the A15 type superconductors have been the subject of more than a thousand publications. The great interest in the A15 materials has, of course, been mainly motivated by their high TC values, the highest known to date having been measured for Nb3Ge: Tc = 23 K.2 From the known data it follows that the maximum Tc in an A15 type compound containing a nontransition element, i.e., Nb3Sn, Nb3Ge, Nb3Ga, Nb3A1, V3Si, or V3Ga, can only be reached if the following conditions are fulfilled: a) stoichiometric composition, b) perfect long-range atomic order, and c) stability of the cubic A15 phase at low temperatures.
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Flükiger, R. (1982). Phase Relationships, Basic Metallurgy, and Superconducting Properties of Nb3Sn and Related Compounds. In: Reed, R.P., Clark, A.F. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering Materials , vol 28. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3542-9_39
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DOI: https://doi.org/10.1007/978-1-4613-3542-9_39
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