Abstract
The properties of spin-glasses with nonmagnetic defects are considered in the vicinity of the “transition point” in a finite magnetic field, by means of a percolational approach. It is shown that the dependence of the magnetic specific heat δC(h) = C(h)−C(o) or of the magnetic susceptibility ∂M(h)/∂h on field and temperature allows us to define the distribution function of finite clusters with respect to their size. In addition to general formulas resulting from the scaling laws, more detailed formulas are obtained for two model distributions: (a) the Bethe lattice distribution, (b) a special model distribution with arbitrary indices.
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