Departamento de Física, FCEN, UBA.
«Magnetic textures beyond long-range order: what neutrons can reveal«
Many condensed matter systems exhibit forms of organization that are not characterized by conventional long-range order, but rather by their spatial correlations resulting from topological constraints and nonequilibrium dynamics. Understanding these magnetic textures requires experimental techniques capable of probing the microscopic arrangement of magnetic moments over a wide range of length scales. Neutron scattering is uniquely suited to this task, providing direct access to bulk magnetic correlations that are often inaccessible to surface-sensitive real-space imaging methods.
In this talk I will illustrate the unique capabilities of magnetic neutron scattering through two representative examples. The first concerns vortex matter in type-II superconductors, where small-angle neutron scattering reveals how ac-dynamics can reorganize the vortex lattice into configurations with different degrees of disorder [1,2]. The second focuses on spin ice, a frustrated magnetic system whose highly correlated disordered state gives rise to distinctive diffuse scattering patterns. Pairing neutron data with computational modeling enables the reconstruction of real-space configurations [3] and lays the groundwork for studying nonequilibrium dynamics across a broad range of magnetic systems.
- M. Marziali Bermúdez et al., Phys. Rev. Lett. 115, 067001 (2015)
- M. Marziali Bermúdez et al., Phys. Rev. B 95, 104505 (2017)
- M. Marziali Bermúdez et al., Phys. Rev. B 112, 094431 (2025)