 Abstract magnetoelasticity is the interaction between magnetism and mechanics. This interaction can be observed at the nanoscale level by measuring the changes in magnetic domains caused by mechanical strain. By using a bimetallic deformation device, researchers were able to measure the effects of strain on magnetic domain walls in a ferromagnetic nickel-fin plate. They found that the magnetic domain walls could be transformed into different orientations depending on the amount of strain applied. Furthermore, they discovered that the magnetic domain walls could be reversibly and deterministically hardened under stress. These findings demonstrate the potential applications of magnetoelasticity in nanotechnology. This article was authored by Deli Kong, Andres Kovacs, Macaulis Charilao, and others.