Abstract

The kinetics of structural relaxations in glassy metal Zr65Al7.5Cu27.5 films are monitored using resistivity measurements. As-prepared samples irreversibly relax towards their metastable equilibrium or steady-state in close relation to co-occurring surface smoothing, when exposed to annealing and ion treatment. Vice versa, ion beams are used as a tool to probe the response to small structural disturbances which are found to relax thermally following a stretched exponential time dependence. A strongly decreasing Kohlrausch exponent with temperature indicates increasing dynamic heterogeneities during successive freezing out of relaxational modes.

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