Selective damping modulation in a synthetic antiferromagnet induced by spin–orbit torque

Abstract

Magnetization dynamics in synthetic antiferromagnet with adjacent Pt layer is investigated. Using dc bias, magnetic damping can be effectively controlled by the spin-orbit torque from the Pt layer. In the spin-flop state, the acoustic mode is modulated by the dc bias, but the optical mode is not sufficiently modulated. In the saturation state, the optical mode is effectively modulated. By appropriately selecting acoustic and optical modes and magnetization states such as the spin-flop and saturation states, modulation of the mutual phases of the ac spin currents driven by the ac damping torques can be realized.

Antiparallel Spin Polarization and Spin Current Induced by Thermal Current and Locally Broken Inversion Symmetry in a Double‐Quantum Well Structure

“…Current‐induced spin polarization (CISP) [ 1–6 ] is generated by breaking the time‐reversal symmetry with current in a system with broken inversion symmetry through the action of the spin–orbit interaction (SOI). The CISP on surfaces of topological insulators [ 7–9 ] and in 2DES [ 10–14 ] has been demonstrated to create the spin diffusion current which can be used for switching the magnetization in ferromagnetic memory.…”