Composition-Dependent Voltage-Driven OFF-ON Switching of Ferromagnetism in Co-Ni Oxide Microdisks.

ABSTRACT: Magneto-ionics, which refers to the modification of the magnetic properties of materials through electric-field-induced ion migration, is emerging as one of the most promising methods to develop nonvolatile energy-efficient memory and spintronic and magnetoelectric devices. Herein, the controlled generation of ferromagnetism from paramagnetic Co-Ni oxide patterned microdisks (prepared upon thermal oxidation of metallic microdisks with dissimilar Co-Ni ratios, i.e., Ni₂₅Co₇₅ and Ni₅₀Co₅₀) is demonstrated under the action of voltage. The effect is related to the partial reduction of the oxide phases to their metallic forms. Samples richer in Co show stronger magneto-ionic activity, which manifests in lower-onset threshold voltages, faster switching

SUBMITTER: Arredondo-Lopez A 

PROVIDER: S-EPMC11826505 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature