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Collective coordinate models of domain wall motion in perpendicularly magnetized systems under the spin hall effect and longitudinal fields
- Source :
- Journal of Magnetism and Magnetic Materials. 426:195-201
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Recent studies on heterostructures of ultrathin ferromagnets sandwiched between a heavy metal layer and an oxide have highlighted the importance of spin-orbit coupling (SOC) and broken inversion symmetry in domain wall (DW) motion. Specifically, chiral DWs are stabilized in these systems due to the Dzyaloshinskii-Moriya interaction (DMI). SOC can also lead to enhanced current induced DW motion, with the Spin Hall effect (SHE) suggested as the dominant mechanism for this observation. The efficiency of SHE driven DW motion depends on the internal magnetic structure of the DW, which could be controlled using externally applied longitudinal in-plane fields. In this work, micromagnetic simulations and collective coordinate models are used to study current-driven DW motion under longitudinal in-plane fields in perpendicularly magnetized samples with strong DMI. Several extended collective coordinate models are developed to reproduce the micromagnetic results. While these extended models show improvements over traditional models of this kind, there are still discrepancies between them and micromagnetic simulations which require further work.
- Subjects :
- Work (thermodynamics)
Point reflection
FOS: Physical sciences
PMA material
02 engineering and technology
01 natural sciences
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
0103 physical sciences
Electronic
Perpendicular
Optical and Magnetic Materials
Spin Hall Effect (SHE)
010306 general physics
Physics
Condensed Matter - Mesoscale and Nanoscale Physics
Magnetic structure
Condensed matter physics
Electronic, Optical and Magnetic Material
Magnetic DW motion
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
021001 nanoscience & nanotechnology
Coupling (physics)
Domain wall (magnetism)
Ferromagnetism
Spin Hall effect
0210 nano-technology
Subjects
Details
- ISSN :
- 03048853
- Volume :
- 426
- Database :
- OpenAIRE
- Journal :
- Journal of Magnetism and Magnetic Materials
- Accession number :
- edsair.doi.dedup.....09767777f69ef4abbb45c30cefe710b0