Facilitating domain wall injection in magnetic nanowires by electrical means
arXiv:2004.07546 · doi:10.1103/PhysRevB.101.224410
Abstract
We investigate how to facilitate the injection of domain walls in chiral ferromagnetic nanowires by electrical means. We calculate the critical current density above which domain walls are injected into the nanowire depending on the material parameters and the source of interaction including spin-transfer torques as well as spin-orbit torques. We demonstrate that the Dzyaloshinskii-Moriya interaction can significantly reduce the required critical current to inject the types of domain walls favored by the Dzyaloshinskii-Moriya interaction. We find that in chiral magnets it is only possible to shed a single domain wall by means of spin-orbit torques, as they modify the ground state orientation of the system. In contrast, for spin-transfer-torque induced shedding of domain walls, we show that there exist two different critical current densities for the two different domain wall chiralities, respectively. Additionally, for the consecutive creation of domain walls by means of spin-transfer torques, we find that the interaction between the domain walls cannot be neglected and even may lead to the pairwise annihilation of consecutive domain walls with opposite chiralities.
arXiv comment9 pages, 8 figures
References in corpus (22)
- 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
- Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
- Real-space observation of current-driven domain wall motion in submicron magnetic wires
- Theory of Current-Driven Domain Wall Motion: A Poorman's Approach
- Anatomy of Spin-Transfer Torque
- Quantitative characterization of the spin orbit torque using harmonic Hall voltage measurements
- Mechanisms of spin-polarized current-driven magnetization switching
- The 2014 Magnetism Roadmap
- Dynamics of domain walls in magnetic nanostrips
- Proposal for an All-Spin Artificial Neural Network: Emulating Neural and Synaptic Functionalities Through Domain Wall Motion in Ferromagnets
- Spin-Based Neuron Model with Domain Wall Magnets as Synapse
- Vertical current induced domain wall motion in MgO-based magnetic tunnel junction with low current densities
- Current driven magnetization dynamics in ferromagnetic nanowires with Dzyaloshinskii-Moriya interaction
- Spin-transfer torque and spin-polarization in topological-insulator/ferromagnet vertical heterostructures
- Magnetoelectric Response of the Time-Reversal Invariant Helical Metal
- Spin-orbit torques in L1-FePt/Pt thin films driven by electrical and thermal currents
- Chiral Domain Wall Injector Driven by Spin-orbit Torques
- Current-driven periodic domain wall creation in ferromagnetic nano-wires
- Spin texture motion in antiferromagnetic and ferromagnetic nanowires
- Annihilation of Domain Walls in a Ferromagnetic Wire