At temperatures near absolute zero, bc approaches 0.142 t for vanadium, a type-i superconductor. the normal phase of vanadium has a magnetic susceptibility close to zero. consider a long, thin vanadium cylinder with its axis parallel to an external magnetic field b⃗ 0 in the +x-direction. at points far from the ends of the cylinder, by symmetry, all the magnetic vectors are parallel to the x-axis.