  The specific heat critical behavior is measured and analyzed for a single
crystal of the random-field Ising system Fe(0.93)Zn(0.07)F2 using pulsed heat
and optical birefringence techniques. This high magnetic concentration sample
does not exhibit the severe scattering hysteresis at low temperature seen in
lower concentration samples and its behavior is therefore that of an
equilibrium random-field Ising model system. The equivalence of the behavior
observed with pulsed heat techniques and optical birefringence is established.
The critical peak appears to be a symmetric, logarithmic divergence, in
disagreement with random-field model computer simulations. The random-field
specific heat scaling function is determined.
