Damien McGrouther

TL;DR: In this article, the authors investigate the Dzyaloshinskii-Moriya interactions in perpendicularly magnetized thin films of Pt/Co/Pt, and show that the insertion of a thin Ir layer leads to reversal of the sign of the effective DMI acting on the sandwiched Co layer, and therefore continuously changes the domain wall structure from the right-to the left-handed Neel wall.

TL;DR: In this paper, the amplitude and phase of the resulting electron-state coherent oscillations are mapped in energy-momentum space via momentum-resolved ultrafast electron spectroscopy.

TL;DR: In this article, the potential energy landscapes created by notches of two different geometries in planar Permalloy nanowires were investigated, and the authors found that the chirality of the domain wall is a key determinant of the pinning potential landscape.

TL;DR: Direct imaging of Néel domain walls with a fixed chirality in device-ready Pt/Co/AlOx films using Lorentz transmission electron and Kerr microscopies shows that any independently nucleated pair of walls in these films form winding pairs when they meet that are difficult to annihilate with field, confirming that they all possess the same topological winding number.

TL;DR: In this paper, femtosecond chiral plasmonic near fields enable the generation and dynamic control on the ultrafast timescale of an electron vortex beam, and the vortex structure of the resulting electron wavepacket is probed in both real and reciprocal space using ultrafast transmission electron microscopy.