Onsager reaction-field theory for magnetic models on diamond and hcp lattices
نویسنده
چکیده
The Onsager reaction-field (ORF) theory is extended to apply to three-dimensional Bravais lattices with a basis. The ORF calculation is used to predict the critical temperature for classical Ising, XY, and Heisenberg magnetic models, in particular, on diamond and hexagonal close packed lattices. Results are compared with series extrapolations and other theoretical approaches where available. For the hcp lattice the ORF calculation is seen to be equivalent to a Green’s function approach by Adler [Physica 107B, 207 (1981)].
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