INMA seminario: Andreas Michels, from the University of Luxembourg
The seminar titled “Neutron scattering as a tool to study complex spin textures” is announced, scheduled to take place on 12 February 2026.
The seminar will be delivered by Prof. Andreas MICHELS, from the Department of Physics and Materials Science at the University of Luxembourg.
Event details:
- Date: 12 February 2026
- Time: 10.30 am
- Location: Salón de Grados Facultad de Ciencias (Lecture Hall, Faculty of Sciences)
About the Seminar: The talk will focus on magnetic small-angle neutron scattering (SANS), a particularly powerful technique for studying the complex magnetic microstructure of materials. SANS provides access to intricate spin textures on mesoscopic length scales, ranging from approximately 1 to 1000 nm, within the bulk of magnetic media.
Understanding the magnetic microstructure and its connection to bulk magnetic behaviour relies on the combined strengths of experimental observation (SANS) and computational modelling. Extensive SANS studies have revealed a rich diversity of non-uniform spin configurations in nanostructured magnets, including quasi-uniform states, canted states, and vortex-like or core-shell-type arrangements.
Prof. Michels will discuss the neutron-scattering signatures associated with dipolar-energy-driven vortex states in magnetic nanoparticles. Furthermore, he will examine the influence of the Dzyaloshinskii–Moriya interaction and surface anisotropy, highlight characteristic features arising from hopfion textures, and report the experimental observation of a recently predicted spin-disorder-induced angular anisotropy in the polarised neutron-scattering cross section. Micromagnetic simulations, which are indispensable for predicting mesoscale spin structures, will also be a central topic, accounting for particle size and shape, defects, and competing magnetic interactions.
