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Examples of cavity formation at the surface of a 7M DMSO sample brought to storage temperature at an average cooling rate of 50°C/min and rewarmed at an average rate of 5°C/min: (a) initial surface deformation, (b) cavity shape in the glassy state, (c) the cavity gradually disappearing when the material regains its flow capability during rewarming, and (d) the corresponding thermal history in the sample.
