2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/158522In chiral ferromagnets, weak spin-orbit interactions twist the ferromagnetic order into spirals, leading to helical order. We investigate an extended Ginzburg-Landau theory of such systems where the helical order is destabilized in favor of crystalline phases. These crystalline phases are based on periodic arrangements of double-twist cylinders and are strongly reminiscent of blue phases in liquid crystals. We discuss the relevance of such blue phases for the phase diagram of the chiral ferromagnet MnSi.6 pages, 5 figures (published version)Strongly Correlated ElectronsSoft Condensed Mattertext