Magneto-ionic vortices: voltage-reconfigurable swirling-spin analog-memory nanomagnets.

ABSTRACT: Rapid progress in information technologies has spurred the need for innovative memory concepts, for which advanced data-processing methods and tailor-made materials are required. Here we introduce a previously unexplored nanoscale magnetic object: an analog magnetic vortex controlled by electric-field-induced ion motion, termed magneto-ionic vortex or "vortion". This state arises from paramagnetic FeCoN through voltage gating and gradual N^3- ion extraction within patterned nanodots. Unlike traditional vortex states, vortions offer comprehensive analog adjustment of key properties such as magnetization amplitude, nucleation/annihilation fields, or coercivity using voltage as an energy-efficient tuning knob. This manipulation occurs post-synthesis, obviating the need for energy-de

SUBMITTER: Spasojevic I 

PROVIDER: S-EPMC11865536 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature