Unconventional magnetization textures and domain-wall pinning in Sm-Co magnets.

ABSTRACT: Some of the best-performing high-temperature magnets are Sm-Co-based alloys with a microstructure that comprises an [Formula: see text] matrix and magnetically hard [Formula: see text] cell walls. This generates a dense domain-wall-pinning network that endows the material with remarkable magnetic hardness. A precise understanding of the coupling between magnetism and microstructure is essential for enhancing the performance of Sm-Co magnets, but experiments and theory have not yet converged to a unified model. Here, transmission electron microscopy, atom probe tomography, and nanometer-resolution off-axis electron holography have been combined with micromagnetic simulations to reveal that the magnetization state in Sm-Co magnets results from curling instabilities and domain-wall pinning ef

SUBMITTER: Pierobon L 

PROVIDER: S-EPMC7713442 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature