Portal de Periódicos da CAPES

Nonlinear Spin-Wave Theory for the Anisotropic Heisenberg Antiferromagnet

1970; American Physical Society; Volume: 2; Issue: 5 Linguagem: Inglês

10.1103/physrevb.2.1338

0556-2805

L. Flax, J. C. Raich,

Physics of Superconductivity and Magnetism

The theory of the anisotropic Heisenberg antiferromagnet is developed in the nonlinear spin-wave approximation. It is shown that the thermodynamic quantities of interest depend on two renormalization parameters. These parameters can be calculated analytically over the entire temperature range of interest. It appears that nonlinear spin-wave theory does not give a good estimate of the transition temperature as the anisotropy increases.