Abstract
We suggest that uncoupled ferromagnetic films in the monolaver regime provide a physical realization of the two-dimensional anisotropic Heisenberg ferromagnet. Using a real space renormalisation group approach we calculate the spontaneous magnetisation of this model system. The calculations account for the observed slow decrease of the magnetisation at low temperatures, with reasonable values of the anisotropy, and also for it's sharp drop close to T c.
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