Comparison of low-field and high-field (18-T) magnetization of the quasicrystal phase of Al₇₃{Mn}₂₁Si₆ shows that only a fraction (from 12% to 25%) of the Mn atoms have a magnetic moment. Below 5.2 K those moments order into a spin-glass phase which display characteristic irreversible properties which are identical to those of classical metallic spin glasses.
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Bellissent et al. (1987) studied this question.
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