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Thin Ni films on top of different nonmagnetic metals have been studied by means of the anomalous Hall effect. Ni on the surface of Mg, In, and Sn does not possess magnetic moments when its thickness is less than about 2.5 atomic layers, whereas on noble-metal substrates even a monolayer of Ni is magnetic.
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Kramer et al. (1983) studied this question.
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