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We report the development of a Mn²⁺ focused ion beam for use in the direct fabrication of submicrometer magnetic structures. Mn-implanted GaAs bulk epilayers and quantum wells are studied by low-temperature cathodoluminescence and polarization-resolved photoluminescence. The data demonstrate that Mn ions are magnetically active, producing optical polarizations of 70% at 8 T.
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Kikkawa et al. (1994) studied this question.
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