Domain wall dynamics of ferrimagnets induced by spin-current near the angular momentum compensation temperature
arXiv:2103.10711 · doi:10.1103/PhysRevB.103.134442
Abstract
We report on a theoretical study of the spin-current excited dynamics of domain walls (DWs) in ferrimagnets in the vicinity of the angular momentum compensation point. Effective Lagrangian and nonlinear dynamic equations are derived for a two-sublattice ferrimagnet taking into account both spin-torques and external magnetic field. The dynamics of the DW before and after the Walker breakdown is calculated for any direction of the spin current polarization. It is shown that for the in-plane polarization of the spin current, the DW mobility reaches a maximum near the temperature of the angular momentum compensation. For the out-of-plane spin polarization, in contrast, a spin current with the densities below the Walker breakdown does not excite the dynamics of the DW. After overcoming the Walker breakdown, the domain wall velocity increases linearly with increasing the current density. In this spin-current polarization configuration the possibility of a gigahertz oscillation dynamics of the quasi-antiferromagnetic vector under the action of a damping-like torque in the angular momentum compensation point is demonstrated. Possible structures for experimental demonstration of the considered effects are discussed.
arXiv comment7 pages, 6 figures
References in corpus (23)
- Antiferromagnetic spintronics
- Electrical switching of an antiferromagnet
- Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
- Fast domain wall motion induced by antiferromagnetic spin dynamics at the angular momentum compensation temperature of ferrimagnets
- Room temperature spin-orbit torque switching induced by a topological insulator
- Switching a spin-valve back and forth by current-induced domain wall motion
- Anomalous current-induced spin torques in ferrimagnets near compensation
- Antiferromagnetic domain wall motion driven by spin-orbit torques
- Current-induced domain wall motion in compensated ferrimagnet
- Domain wall dynamics driven by adiabatic spin transfer torques
- Enhancement of Perpendicular Magnetic Anisotropy and Transmission of Spin-Hall-Effect-Induced Spin Currents by a Hf Spacer Layer in W/Hf/CoFeB/MgO Layer
- Ultrafast Magnetization Reversal by Picosecond Electrical Pulses
- Vertical current induced domain wall motion in MgO-based magnetic tunnel junction with low current densities
- Spin-Orbit Torques in ferrimagnetic GdFeCo Alloys
- High domain wall velocities due to spin currents perpendicular to the plane
- Spin-transfer torques for domain walls in antiferromagnetically coupled ferrimagnets
- Micromagnetic modeling of Terahertz oscillations in an antiferromagnetic material driven by spin-Hall effect
- Coherent Terahertz Spin-Wave Emission Associated with Ferrimagnetic Domain Wall Dynamics
- H-T Phase Diagram of Rare-Earth -- Transition Metal Alloy in the Vicinity of the Compensation Point
- Unusual Field Dependence of Anomalous Hall Effect in Ta/TbFeCo
- Current-driven domain wall dynamics in ferrimagnets: micromagnetic approach and collective coordinates model
- Anomalies in the dynamics of ferrimagnets near the angular momentum compensation point
- Domain wall displacement by remote spin-current injection