Abstract
The profile of the field-cooled magnetisation is considered in the vicinity of the spin-glass transition for the Parisi (1978, 1980, 1983) solution. In a finite field the flat profile of Parisi and Toulouse (1980) is modified and one observes a weak cusp. Analytic expansions are obtained both for the high-field (low-temperature) and low-field (high-temperature) regimes.
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