Optimal protocol for spin-orbit torque switching of a perpendicular nanomagnet
arXiv:2203.01167 · doi:10.1103/PhysRevB.105.134404
Abstract
It is demonstrated by means of the optimal control theory that the energy cost of the spin-orbit torque induced reversal of a nanomagnet with perpendicular anisotropy can be strongly reduced by proper shaping of both in-plane components of the current pulse. The time-dependence of the optimal switching pulse that minimizes the energy cost associated with Joule heating is derived analytically in terms of the required reversal time and material properties. The optimal reversal time providing a tradeoff between the switching speed and energy efficiency is obtained. A sweet-spot balance between the field-like and damping-like components of the spin-orbit torque is discovered; it permits for a particularly efficient switching by a down-chirped rotating current pulse whose duration does not need to be adjusted precisely.
arXiv comment6 pages, 3 figures
References in corpus (32)
- Spin torque switching with the giant spin Hall effect of tantalum
- Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
- Symmetry and magnitude of spin-orbit torques in ferromagnetic heterostructures
- Switching of perpendicular magnetization by spin-orbit torques in the absence of external magnetic fields
- Magnetization switching by spin-orbit torque in an antiferromagnet/ferromagnet bilayer system
- Layer thickness dependence of the current induced effective field vector in Ta|CoFeB|MgO
- Spin-orbit torques induced by interface-generated spin currents
- Current induced torques and interfacial spin-orbit coupling: Semiclassical Modeling
- Ultrafast magnetization switching by spin-orbit torques
- Switching of magnetization by non-linear resonance studied in single nanoparticles
- Field-free magnetization reversal by spin-Hall effect and exchange bias
- Threshold current for switching of a perpendicular magnetic layer induced by spin Hall effect
- Switching of Perpendicularly Polarized Nanomagnets with Spin Orbit Torque without an External Magnetic Field by Engineering a Tilted Anisotropy
- Harnessing non-local orbital-to-spin conversion of interfacial orbital currents for efficient spin-orbit torques
- Angular and temperature dependence of current induced spin-orbit effective fields in Ta/CoFeB/MgO nanowires
- Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
- Nanosecond-timescale low error switching of in-plane magnetic tunnel junctions through dynamic Oersted-field assisted spin-Hall effect
- Magnetization reversal through synchronization with a microwave
- Stable and fast semi-implicit integration of the stochastic Landau-Lifshitz equation
- Critical current destabilizing perpendicular magnetization by the spin Hall effect
- Anomalous spin-orbit torque switching due to field-like torque-assisted domain wall reflection
- Theoretical limit of the minimal magnetization switching field and the optimal field pulse for Stoner particles
- Electric-field control of spin-orbit torques in perpendicularly magnetized W/CoFeB/MgO films
- Magnetization reversal in the anisotropy-dominated regime using time-dependent magnetic fields
- Minimization of Ohmic losses for domain wall motion in a ferromagnetic nanowire
- Critical current under an optimal time-dependent polarization direction for Stoner particles in spin-transfer torque induced fast magnetization reversal
- Reversal of magnetization of a single-domain magnetic particle by the ac field of time-dependent frequency
- Optimal switching of a nanomagnet assisted by microwaves
- Breaking the current density threshold in spin-orbit-torque magnetic random access memory
- Autoresonant control of the magnetization switching in single-domain nanoparticles
- Microwave-assisted switching of a nanomagnet: analytical determination of the optimal microwave field
- Optimal control of magnetization reversal in a monodomain particle by means of applied magnetic field
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- Controlled Quasi-Latitudinal Solutions for ultra-fast Spin-Torque Precessional Magnetization Switching