|About this Abstract
||MS&T23: Materials Science & Technology
||Interface-mediated Phenomena in Structural Materials
||In-situ TEM Study of Grain Boundary Motion in 2D Skyrmion Lattice: A Combined Individual and Collective Particle Motion
||Lin Zhou, Xiaotian Fang, Valeri Viteri-Pflucker, Jian Wang, Alexander King
|On-Site Speaker (Planned)
Controlling the grain boundary (GB) migration during processing is necessary to tailor the physical properties of polycrystalline materials that are governed by GBs. Despite extensive research on the mechanism of GB migration, both theoretically and experimentally, the results are still insufficient to reveal the atomistic behaviors of GB migration over long distances and periods continuously. In this study, we triggered controllable GB migration in a 2D skyrmion lattice and observed the GB migration process at the single-particle level at different temperatures. Our findings indicate that GB migration is a jerky motion consisting of alternating stationary and high-speed stages. The migration also shows similarity to string oscillation, which demonstrates either amplitude or frequency change with time. Our study provides new insights into grain growth, in addition to the classic von Neumann-Mullins theory, by directly revealing the mechanisms of GB migration.