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Excitations in randomly diluted two-dimensional ferromagnets

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  • McGurn, A.R.
  • Tahir-Kheli, Raza A.

Abstract

The dynamics of a randomly diluted Heisenberg ferromagnet on a two-dimensional square lattice is calculated using a CPA procedure introduced by Theumann and Tahir-Kheli. The density of states and frequency-wave-vector-dependent response functions at various symmetry points of the Brillouin zone are presented for several magnetic concentrations. Our results for the density of states are compared with those obtained from computer-experiment calculations of Huber and are found to be in good agreement with them. The spin-wave stiffness coefficient is calculated, and comparison is made with results on two-dimensional resistor networks given by Watson et al.

Suggested Citation

  • McGurn, A.R. & Tahir-Kheli, Raza A., 1977. "Excitations in randomly diluted two-dimensional ferromagnets," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 86(3), pages 553-573.
    • Handle: RePEc:eee:phsmap:v:86:y:1977:i:3:p:553-573
    DOI: 10.1016/0378-4371(77)90094-2
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    References listed on IDEAS

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    1. Charles G. Leathers & John S. Evans, 1974. "Veblen's Ideal and the Contemporary U.S. Economy: A Contrast," American Journal of Economics and Sociology, Wiley Blackwell, vol. 33(4), pages 409-409, October.
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