Calculation of free energies for a three-dimensional Ising model by a modified Kandanoff's variational method

[[abstract]]The modified Kadanoff's variational method recently considered by us is applied to calculate the free energies and their derivatives for a three-dimensional Ising model with bcc structure and without external magnetic field. We find a critical point at kc=0.162134 and the associated critical indices α=0.12, α′=0.095.[[notice]]補正完畢[[journaltype]]國外[[booktype]]紙本[[booktype]]電子