Accurate Monte Carlo data from a set of isotherms near the critical point are analyzed using two RG based complementary representations, given respectively in terms of $\bar h=h/\mid t \mid^{ \beta\delta}$ and $\bar \tau=t/h^{ 1/\beta\delta}$. Scaling plots for data on simple cubic Ising lattices are compared with plots of $ML^{ \beta\nu}$ vs. $\mid t \mid L^{ 1/\nu}$ for increasing $L$ values and with high quality experimental data on $CrBr_{ 3}$. Finite size effects and the equation of state are discussed.
Categories: cond-mat.stat-mech