Within the stochastical lattice model of amorphous Heisenberg and Ising ferromagnets the influence is investigated of fluctuations of exchange integrals on the Curie temperature Tc for different spin values and numbers of nearest neighbours using the constant coupling approximation and a high temperature expansion for the susceptibility χ. TC and χ are always reduced by the fluctuations of the exchange integrals within the Heisenberg model for any spin and within the Ising model for S = 1/2 (for S ≧ 1 the situation is more complicated). The structure fluctuations lead to two opposite effects: 1. weakening of magnetic long range order and 2. increase of magnetic clustering (short range order).
No takes yet. Share an insight, caveat, or question.
Schreiber et al. (1975) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:
More from physica status solidi (b)