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The presence of a ferromagnetic transition in single, modulation-doped, 8 nm quantum well of Cd0.976Mn0.024Te/Cd0.66Mg0.27Zn0.07Te:N is evidenced by photoluminescence magnetospectroscopy. The transition is driven by long range Ruderman-Kittel-Kasuya-Yosida interactions between Mn spins, mediated by 2×10¹¹ holes per cm². It occurs at 1.8 K, in agreement with a mean-field model.
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Haury et al. (1997) studied this question.
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