We report the results of measurements of the low-temperature specific heat Cₚ(T) of annealed samples of decagonal Al69.8Mn18.1Pd12.1. A comparison with similar data, previously obtained for decagonal Al-Cu-Co quasicrystals, indicate a substantial excess specific heat Cₑₓ(T) in the Al-Mn-Pd material, most likely due to magnetic degrees of freedom. The temperature dependence of Cₑₓ(T) suggests a spin freezing phenomenon at Tf=12K, which is confirmed by the temperature dependence of the third-order magnetic susceptibility χ₃(T) and the time dependence of the remanent magnetization well below Tf.
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Черников et al. (2003) studied this question.
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