AC Current-Driven Magnetization Switching and Nonlinear Hall Rectification in a Magnetic Topological Insulator.

ABSTRACT: Spin-orbit torque arising from the spin-orbit-coupled surface states of topological insulators enables current-induced control of magnetization with high efficiency. Here, alternating-current (AC) driven magnetization reversal is demonstrated in a semi-magnetic topological insulator (Cr,Bi,Sb)₂Te₃/(Bi,Sb)₂Te₃, facilitated by a low threshold current density of 1.5 × 10⁹ A m^-2. Time-domain Hall voltage measurements using an oscilloscope reveal a strongly nonlinear and rectified Hall response during the magnetization reversal process. Fourier analysis of the time-varying Hall voltage identifies higher-harmonic signals and a rectified direct-current (DC) component, highlighting the complex interplay among the applied current, ex

SUBMITTER: Kiyonaga Y 

PROVIDER: S-EPMC12810608 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature