Three-dimensional Resonant Magnetization Dynamics Unraveled by Time-Resolved Soft X-ray Laminography

TL;DR

This paper introduces a novel 3D imaging technique for magnetization dynamics using soft X-ray laminography, enabling detailed spatiotemporal analysis of resonant magnetic modes in microstructures.

Contribution

The study develops an experimental setup for 3D time-resolved imaging of magnetization dynamics, allowing investigation of complex magnetic behaviors in all three spatial dimensions.

Findings

Resolved 3D dynamics of vortex gyration and domain wall modes

Demonstrated tunable frequency control of magnetic processes

Enhanced understanding of 3D magnetic system behaviors

Abstract

The imaging of magneto-dynamical processes has been, so far, mostly a two-dimensional business, due to the constraints of the available experimental techniques. In this manuscript, building on the recent developments of soft X-ray magnetic laminography, we present an experimental setup where magneto-dynamical processes can be resolved in all three spatial dimensions and in time, with the possibility to freely tune the frequency of the dynamical process. We then employ this setup to investigate the three-dimensional dynamics of two resonant magneto-dynamical modes in a CoFeB microstructure occurring at different frequencies, namely the fundamental vortex gyration mode and a magnetic field-induced domain wall excitation mode. This new technique provides much needed capabilities for the experimental investigation of the magnetization dynamics of three-dimensional magnetic systems.