Superconducting properties of Chevrel phase PbMo6S8wires produced by the powder process

We have fabricated Chevrel phase PbMo
6
S
8
wires 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 PbMo
6
S
8
compound was formed from PbS, Mo and MoS
2
mixed powders. We measured the critical current for a 27 cm long wire wound around a cylindrical specimen holder, and observed a very high J
c
value - 5.5 × 10
⁴
A/cm
²
at 8 T, calculated for the segment of the PbMo
6
S
8
compound. We have also investigated the influence of the preparation conditions upon the T
c
and -(dB
c2
/dT) values of bulk samples, in order to know the appropriate synthesis conditions to obtain high T
c
and high B
c2
PbMo
6
S
8
compound in the wire.