volume 110, issue 2, P669-675 1982
DOI: 10.1002/pssb.2221100237
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Abstract: J. A. PLASCAK and K. P. SILVA: Double Chain Approximation to the Ising Model 669 phys. stat. sol. (b) 110, 669 (1982)To calcnlate thermodynamic properties of the anisotropic Ising model, a double chain approximation (DCA), based on Bogolyubov's variational procedure, is presented. The critical temperatures are compared t o those obtained by the usual mean field approximation (MFA), the linear chain approximation (LCA), and the exact or series results, when existing. A fitting of the spontaneous polarization a…

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