Geometry-induced spin chirality in a non-chiral ferromagnet at zero field.

ABSTRACT: Spin chirality is a fundamental property that manifests non-reciprocal transport-magnetochiral anisotropy (MChA). However, the application of MChA in technology is constrained by the necessity for an external magnetic field, complex non-centrosymmetric crystal synthesis and cryogenic environments. Here we overcome these challenges by imprinting geometric chirality onto a nickel tube via three-dimensional nanoengineering. We use two-photon lithography to create a structurally twisted polymeric template with micrometre-sized pitch and diameters and cover it with a uniform 30-nm-thick nickel shell. The nickel tube exhibits spontaneous MChA-non-reciprocal transport at zero magnetic field and room temperature. X-ray magnetic circular dichroism microscopy confirms helical spin textures stabilize

SUBMITTER: Xu M 

PROVIDER: S-EPMC12819137 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature