  The binary compound V$_3$Ga can exhibit two near-equilibrium phases,
consisting of the A15 structure that is superconducting, and the Heusler D0$_3$
structure that is semiconducting and antiferromagnetic. Density functional
theory calculations show that the two phases are closely degenerate, being
separated by only ~10 meV/atom. Magnetization measurements on bulk-grown
samples show superconducting behavior below 14 K. These results indicate the
possibility of using V$_3$Ga for quantum technology devices utilizing both
superconductivity and antiferromagnetism at the same temperature.
