  Magnetic, specific heat, and structural properties of the equiatomic Cantor
alloy system are reported for temperatures between 5 kelvin and 300 kelvin, and
up to fields of 70 kilo-oersted. Magnetization measurements performed on
as-cast, annealed, and cold-worked samples reveal a strong processing history
dependence and that high-temperature annealing after cold-working does not
restore the alloy to a pristine state. Measurements on known precipitates show
that the two transitions, detected at 43 kelvin and 85 kelvin, are intrinsic to
the Cantor alloy and not the result of an impurity phase. Experimental and ab
initio density functional theory (DFT) computational results suggest that these
transitions are a weak ferrimagnetic transition and a spin-glass-like
transition, respectively, and magnetic and specific heat measurements provide
evidence of significant Stoner enhancement and electron-electron interactions
within the material.
