The highest temperatures at which BiSb, as a thin film of thicknesses 150–1350 Å, superconducts (the critical temperature T) is approximately 2 K. Single crystal BiSb can superconduct at slightly higher temperatures, and at 4.2 K, its critical magnetic field B (the maximum magnetic field that the superconductor can expel) of 1.6 T at 4.2 K.