Magnetic field orientation dependence of Jc in Bi-2212 round wires

The magnetic field dependence of isothermal melt-processed Bi-2212/Ag round wires' critical current density was measured. Minimal dependence of critical current density was observed when the magnetic field direction was rotated normal to the wire axis. When the direction of the magnetic field was rotated parallel to the wire axis, critical current density at 64 K and 0.2 T rose by more than a factor of four.