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A new, very sensitive method was used to study the existence of magnetic moments of Fe and Ni when deposited on a nonmagnetic metal. Evidence is presented that isolated Ni atoms possess a magnetic moment on the surface of Pb, contrary to previous results. At greater coverage of Ni and Fe the onset of ferromagnetism was found at the thickness observed in other experiments. The technique is sensitive to 10^-6 of an atomic layer of Fe and can detect the existence of localized moments of magnetic materials on any metal substrate.
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Moodera et al. (1985) studied this question.
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