Abstract
Time dependence of the magnetic susceptibility of two kinds of AlPdMn icosahedral quasicrystals was studied to investigate the phason relaxation in the anneal after water quench. Al70Pd21.5Mn8.5 remained in the f-type structure and Al71Pd21Mn8 transformed to p-type. A universal time dependence was found in the initial decrease in the susceptibility characterized by square root of time. The whole time dependence fits quite well to a function representing phason relaxation predicted by Toner.
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