Mean spin per site in the linearised spin-wave theory of a dilute two dimensional antiferromagnet

J W Halley, W. K. Holcomb

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Abstract

The authors compute the mean spin per site (Sz) using the linearised randomly dilute two-dimensional antiferromagnetic Heisenberg model developed by Thorpe and Alben. The result shows that (S- mod (Sz) mod )/S is 14-16% near the percolation concentration. Mean spins on small finite clusters in this model are in very poor agreement with exact results of (S z)=0 for HA=0. The mean spin on the largest cluster is reasonably self-consistent but spatial inhomogeneities in (Si z) are not treated self-consistently in the model.

Original languageEnglish (US)
Article number019
Pages (from-to)753-759
Number of pages7
JournalJournal of Physics C: Solid State Physics
Volume11
Issue number4
DOIs
StatePublished - Dec 1 1978

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