Yes. For example, https://www.nature.com/articles/nature08500 https://www.nature.com/articles/nature08500 : > Using muon spin rotation as a suitable local prob

Yes. For example, https://www.nature.com/articles/nature08500 https://www.nature.com/articles/nature08500 : > Using muon spin rotation as a suitable local probe, we apply the method to a real material, the ‘spin ice’ Dy2Ti2O7 (refs 5–8). Our experimental measurements prove that magnetic charges exist in this material, interact via a Coulomb potential, and have measurable currents. This new paper points out how these monopoles are different, at https://www.nature.com/articles/s41563-023-01737-4 https://www.nature.com/articles/s41563-023-01737-4 > The reported duality between magnetic charges and topological AFM textures sheds light on a new class of materials hosting 2D monopolar physics in contrast with other systems that harbour emergent magnetic monopoles, such as the pyrochlore spin ice. Although intriguing, monopoles in spin ice are intrinsically distinct, as they have an underlying gauge charge, which is topological and quantized. Conversely, the emergent magnetic charges in haematite are 2D, not quantized and are topological in the sense that they dress topological AFM textures underpinning them.