The ability to experimentally map the three-dimensional structure and dynamics in bulk and patterned three-dimensional ferromagnets is essential both for understanding fundamental micromagnetic processes, as well as for investigating technologically-relevant micromagnets whose functions are connected to the presence and dynamics of fundamental micromagnetic structures, such as domain walls and vortices. Here, we demonstrate time-resolved magnetic laminography, a technique which offers access to the temporal evolution of a complex three-dimensional magnetic structure with nanoscale resolution. We image the dynamics of the complex three-dimensional magnetization state in a two-phase bulk magnet with a lateral spatial resolution of 50 nm, mapping the transition between domain wall precession and the dynamics of a uniform magnetic domain that is attributed to variations in the magnetization state across the phase boundary. The capability to probe three-dimensional magnetic structures with temporal resolution paves the way for the experimental investigation of novel functionalities arising from dynamic phenomena in bulk and three-dimensional patterned nanomagnets.
@article{arxiv.2001.07940,
title = {Imaging three-dimensional nanoscale magnetization dynamics},
author = {Claire Donnelly and Simone Finizio and Sebastian Gliga and Mirko Holler and Aleš Hrabec and Michal Odstrčil and Sina Mayr and Valerio Scagnoli and Laura J. Heyderman and Manuel Guizar-Sicairos and Jörg Raabe},
journal= {arXiv preprint arXiv:2001.07940},
year = {2025}
}