Double Superconducting Transitions in Single Crystals ofV3Si

Nearly stoichiometric ${\mathrm{V}}_3$Si single crystal have been found to exhibit a double superconducting transition which in this instance is believed to be a fundamental physical feature representing an intermediate case between transforming and nontransforming material. A correlation between the existence and degree of the structural transformation and departure from stoichiometry in the Si-rich direction has also been observed.