Fig. 5: Magnetic phase diagram of skyrmion bundles.
From: Stable skyrmion bundles at room temperature and zero magnetic field in a chiral magnet
a The topological quantized annihilation of a Q = 1 bundle with increasing field. b. Topological transformation from a Q = 1 bundle to the magnetic helix in the field-decreasing process. c Stable skyrmion bundles under zero magnetic field. d–f Magnetic phase diagrams of the skyrmion bundles (0, 1, and 2) as a function of temperature and magnetic field. The data points in the diagram are the critical points of the two-state transition. FM and PM represent ferromagnetic and paramagnetic states, respectively. The colorwheel represents the in-plane magnetization distributions in (a–c).
