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Chiral cubic Co-Zn-Mn magnets exhibit diverse topological spin textures,including room-temperature skyrmion phases and robust far-from-equilibriummetastable states. Despite recent advances in understanding metastableskyrmions, the interplay between compositional disorder and varying magneticanisotropy on the stability and decay of metastable textures, particularly nearroom temperature, remains incompletely understood. In this work, theequilibrium and metastable skyrmion formation in Co$_{8}$Zn$_{9}$Mn$_{3}$ isexamined, revealing transformations between distinct metastable spin texturesinduced by temperature and magnetic field. At room temperature, the decaydynamics of metastable skyrmions exhibits a strong dependence on magneticanisotropy, showcasing a route towards tailoring relaxation behavior.Furthermore, a nascent double-$q$ spin texture, characterized by two coexistingmagnetic modulation vectors $q$, is identified as a minority phase alongsidethe conventional triple-$q$ hexagonal skyrmion lattice. This double-$q$ texturecan be quenched as a metastable state, suggesting both its topologicalcharacter, and its role as a potential intermediary of metastable skyrmiondecay. These findings provide new insights into the tunability of equilibriumand metastable topological spin textures via chemical composition and magneticanisotropy, offering strategies for designing materials with customizable anddynamic skyrmion properties for advanced technological applications.

Anisotropy-dependent decay of room temperature metastable skyrmions and a nascent double-$q$ spin texture in Co$_{8}$Zn$_{9}$Mn$_{3}$