Browsing Faculty of Science by Subject "Spin Hamiltonians"

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  • Critical behavior of two-dimensional magnetic systems with dipole-dipole interactions 

    De'Bell, K.; Geldart, D. J. W. (1989-01/01)
    The critical exponents of two-dimensional dipolar magnetic systems with isotropic in-plane ordering may be obtained from the expansion which determines the exponents of isotropic three-dimensional dipolar systems. However, ...

  • Lattice sums for dipolar systems 

    Fujiki, N. M.; De'Bell, K.; Geldart, D. J. W. (1987-12/01)
    A general method for the evaluation of lattice sums determining the effective parameters in the Hamiltonian of a dipolar magnetic system is described. The anisotropy of the Hamiltonian is examined for crystal structures ...