Magnetovolume in chromium: collapse of moments above the Neel temperature

The magnetovolumes of Cr and a Cr 99.5 V 0.5 alloy relative to a paramagnetic Cr 95 V 5 alloy are deduced from the thermal expansion measurement of Roberts et al. (1983). The data indicate a relatively small ground-state magnetovolume of about 0.15% in Cr, and a collapse of the self-consistent moments above the Neel temperature, where the magneto-volume due to the remaining critical fluctuations decays approximately exponentially with temperature.