Abstract

The newly discovered high-T c superconductor A15 Nb3Si, with a lattice parameter of 5.091 a, is shown to have an anomalously low H c2 of 12.5 ± 0.5 T, a Ginzburg-Landau κ of 16 ± 2, and an implied resistivity of 35 ± 5ΜΩ-cm. The question of whether poor ordering due to the explosive compression preparation is responsible for this low H c2 is discussed.

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