M. Yessik’s research while affiliated with Syracuse University and other places

The specific heat of iron-vanadium alloys with 8–45 at.% iron was measured between 125°K and 625°K in an adiabatic calorimeter. The total specific heat was separated into a lattice contribution, a dilatation correction, and a term linear in temperature. The coefficient of the linear term was associated with the electronic specific heat coefficient, γ, and compared with results of specific heat measurements at liquid helium temperatures. These agree for the alloys with up to 33 at.% iron, but differ considerably for the alloys with higher iron concentration.A similar analysis of enthalpy measurements made on these alloys from 800 to 1200°K yields γ values which agree with the liquid helium results for all alloy compositions.It is concluded that the interpretation of the liquid helium measurements is essentially correct and that between 100°K and 700°K there are magnetic contributions to the specific heat of the alloys of 35 and 45 at.% iron.