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The perpendicular exchange bias effect in multilayer systems Cr2O3(0001)/[Co/Pt]n, n ≥ 1, is strongly correlated with the temperature dependence of the antiferromagnetic order parameter in Cr2O3 in the vicinity of its Néel temperature. A crossover between surface and 3D bulk critical behavior is found for the interface moments of Cr2O3. In addition, for the first time, a specific exchange bias-related contribution to the ferromagnetic coercive field could be separated.
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Borisov et al. (2011) studied this question.
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