Cycling of a metallic glass between ambient and cryogenic temperatures can induce higher-energy states characteristic formation on faster cooling. This rejuvenation, unexpected because it occurs at small macroscopic strains well below the thermally induced structural change, is important, for example, in improving plasticity. Molecular-dynamics simulations elucidate mechanisms by which thermal ...

In the spirit of multi-scale modelling magnetization dynamics at elevated temperature is often simulated in terms of a spin model where the model parameters are derived from first principles. While these parameters are mostly assumed temperature-independent and thermal properties arise from spin fluctuations only, other scenarios are also possible. Choosing bcc Fe as an example, we investigate ...