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Critical temperature for a system with Heisenberg-like nearest neighbour and Ising-like next nearest neighbour interactions

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  • Komoda, A.
  • Pȩkalski, A.

Abstract

A ferromagnetic system with S = 12, where the interactions between nearest neighbours are isotropic (having Heisenberg character) and those between the next nearest neighbours anisotropic (Ising-like), is investigated. Using the effective hamiltonian approach we find the change in the critical temperature due to the inclusion of next nearest neighbour interactions of different character. The change is greatest in two dimensions where the critical temperature is shifted up from its zero value for a system with the Ising-like interactions switched off. We also calculate the Tc for a system with both nearest and next nearest neighbours interactions of the Ising-type. The results for the two models are compared.

Suggested Citation

  • Komoda, A. & Pȩkalski, A., 1981. "Critical temperature for a system with Heisenberg-like nearest neighbour and Ising-like next nearest neighbour interactions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 108(1), pages 164-168.
    • Handle: RePEc:eee:phsmap:v:108:y:1981:i:1:p:164-168
    DOI: 10.1016/0378-4371(81)90171-0
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