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We study a magnetic superlattice in which one of the inner atomic layers has been modified. We use the Ising model in the mean-field approximation. We find that if the modified exchange constant J₀ is greater than that in the bulk, localized magnetism occurs, with the magnetization decaying in both directions for the infinite superlattice. The transition temperatures for finite and infinite systems are calculated for both uniform and alternating superlattices.
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H.K. Sy (1992) studied this question.
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