Imaging magnetic spiral phases, skyrmion clusters, and skyrmion displacements at the surface of bulk Cu₂OSeO₃.

ABSTRACT: Surfaces - by breaking bulk symmetries, introducing roughness, or hosting defects - can significantly influence magnetic order in magnetic materials. Determining their effect on the complex nanometer-scale phases present in certain non-centrosymmetric magnets is an outstanding problem requiring high-resolution magnetic microscopy. Here, we use scanning SQUID microscopy to image the surface of bulk Cu₂OSeO₃ at low temperature and in a magnetic field applied along 100 . Real-space maps measured as a function of applied field reveal the microscopic structure of the magnetic phases and their transitions. In low applied field, we observe a magnetic texture consistent with an in-plane stripe phase, pointing to the existence of a distinct surface state. In the low-temperatur

SUBMITTER: Marchiori E 

PROVIDER: S-EPMC11438600 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature