Superconducting properties of Chevrel phase PbMo6S8wires produced by the powder process

We have fabricated Chevrel phase PbMo6S8wires by the powder process and observed a very high critical current density. SUS-Mo sheathed wires were made through hot-swaging and hot-drawing operations, and the PbMo6S8compound was formed from PbS, Mo and MoS2mixed powders. We measured the critical current for a 27 cm long wire wound around a cylindrical specimen holder, and observed a very high Jcvalue - 5.5 × 10⁴A/cm²at 8 T, calculated for the segment of the PbMo6S8compound. We have also investigated the influence of the preparation conditions upon the Tcand -(dBc2/dT) values of bulk samples, in order to know the appropriate synthesis conditions to obtain high Tcand high Bc2PbMo6S8compound in the wire.