The skyrmion-bubble transition in a ferromagnetic thin film

• DOI: 10.21468/scipostphys.4.5.027
• Publication Date: 2018-05-25T14:31:38Z
• Authors: Anne Bernand-Mantel; Lorenzo Camosi; Alexis Wartelle; Nicolas Rougemaille; Michaël Darques; Laurent Ranno
• Keywords: Skyrmion; Topological defect

Magnetic skyrmions and bubbles, observed in ferromagnetic thin films with perpendicular magnetic anisotropy, are topological solitons which differ by their characteristic size the balance energies at origin of stabilisation. However, these two spin textures have same topology a continuous transformation between them is allowed. In present work, we derive an analytical model to explore skyrmion-bubble transition. We evidence region parameter space where both soliton solutions coexist close transformations skyrmion bubbles as function field. Above critical point, energy barrier separating vanishes, only one solution remains, can be continuously tuned from micrometer nanometer applied