Spin-transfer torques for domain walls in antiferromagnetically coupled ferrimagnets
arXiv:1903.03251 · doi:10.1038/s41928-019-0303-5
Abstract
Antiferromagnetic materials are outstanding candidates for next generation spintronic applications, because their ultrafast spin dynamics makes it possible to realize several orders of magnitude higher-speed devices than conventional ferromagnetic materials1. Though spin-transfer torque (STT) is a key for electrical control of spins as successfully demonstrated in ferromagnetic spintronics, experimental understanding of STT in antiferromagnets has been still lacking despite a number of pertinent theoretical studies2-5. Here, we report experimental results on the effects of STT on domain-wall (DW) motion in antiferromagnetically-coupled ferrimagnets. We find that non-adiabatic STT acts like a staggered magnetic field and thus can drive DWs effectively. Moreover, the non-adiabaticity parameter β of STT is found to be significantly larger than the Gilbert damping parameter α, challenging our conventional understanding of the non-adiabatic STT based on ferromagnets as well as leading to fast current-induced antiferromagnetic DW motion. Our study will lead to further vigorous exploration of STT for antiferromagnetic spin textures for fundamental physics on spin-charge interaction as wells for efficient electrical control of antiferromagnetic devices.
arXiv comment19 pages, 4 figures
References in corpus (24)
- Antiferromagnetic spintronics
- Antiferromagnetic spintronics
- Current-driven dynamics of chiral ferromagnetic domain walls
- Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
- Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
- Theory of Current-Driven Domain Wall Motion: A Poorman's Approach
- Domain wall motion governed by the spin Hall effect
- Fast domain wall motion induced by antiferromagnetic spin dynamics at the angular momentum compensation temperature of ferrimagnets
- Domain wall mobility, stability and Walker breakdown in magnetic nanowires
- Current-induced domain wall motion in compensated ferrimagnet
- Phenomenology of Current-Induced Dynamics in Antiferromagnets
- Staggered Dynamics in Antiferromagnets by Collective Coordinates
- Spin Transfer Torque for Continuously Variable Magnetization
- Current-induced magnetization dynamics in disordered itinerant ferromagnets
- Theory of current-driven magnetization dynamics in inhomogeneous ferromagnets
- Long spin coherence length and bulk-like spin-orbit torque in ferrimagnetic multilayers
- Spin-transfer torques in anti-ferromagnetic metals from first principles
- Self-Focusing Skyrmion Racetracks in Ferrimagnets
- Non-Adiabatic Spin Transfer Torque in Real Materials
- Gilbert damping phenomenology for two-sublattice magnets
- Correlation between Compensation Temperatures of Magnetization and Angular Momentum in GdFeCo Ferrimagnets
- Spin torque and force due to current for general spin textures
- Low magnetic damping of ferrimagnetic GdFeCo alloys
- Spin-transfer torques in antiferromagnets: efficiency and quantification method
Cited by in corpus (20)
- Current-driven domain wall dynamics in ferrimagnetic Ni-doped Mn4N films : very large domain wall velocities and reversal of motion direction across the magnetic compensation point
- Spintronics on Chiral Objects
- Sub-terahertz ferrimagnetic spin-transfer torque oscillator
- Domain wall dynamics in antiferromagnetically-coupled double-lattice systems
- Unveiling domain wall dynamics of ferrimagnets in thermal magnon currents: competition of angular momentum transfer and entropic torque
- Precession-free domain wall dynamics in compensated ferrimagnets
- The dynamics of a domain wall in ferrimagnets driven by spin-transfer torque
- Domain wall dynamics of ferrimagnets induced by spin-current near the angular momentum compensation temperature
- Effect of inhomogeneous Dzyaloshinskii-Moriya interaction on antiferromagnetic spin-wave propagation
- On field-driven domain wall motion in compensated ferrimagnetic nanowires
- Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls
- Microscopic Calculation of Spin Torques in Textured Antiferromagnets
- Adiabatic and Nonadiabatic Spin-transfer Torques in Antiferromagnets
- Novel interpretation of recent experiments on the dynamics of domain walls along ferrimagnetic strips
- Speeding up explicit numerical evaluation methods for micromagnetic simulations using demagnetizing field polynomial extrapolation
- Magnetic-Field-Driven Antiferromagnetic Domain Wall Motion
- Alternative understanding of the skyrmion Hall effect based on one-dimensional domain wall motion
- High-mobility inertial domain walls driven by spin-transfer torque in a ferrimagnetic spinel oxide
- Magnetic domain structure and domain wall bound states of topological semimetal EuB6
- Current-Induced Spin-Wave Doppler Shift in Antiferromagnets