Skip to Main content Skip to Navigation
Journal articles

Spin-orbit torque driven chiral magnetization reversal in ultrathin nanostructures

Abstract : We show that the spin-orbit torque induced magnetization switching in nanomagnets presenting Dzyaloshinskii-Moriya (DMI) interaction is governed by a chiral domain nucleation at the edges. The nucleation is induced by the DMI and the applied in-plane magnetic field followed by domain-wall propagation. Our micromagnetic simulations show that the dc switching current can be defined as the edge nucleation current, which decreases strongly with increasing amplitude of the DMI. This description allows us to build a simple analytical model to quantitatively predict the switching current. We find that domain nucleation occurs down to a lateral size of 25 nm, defined by the length scale of the DMI, beyond which the reversal mechanism approaches a macrospin behavior. The switching is deterministic and bipolar.
Document type :
Journal articles
Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/cea-01734611
Contributor : Jérôme Planès <>
Submitted on : Wednesday, March 14, 2018 - 6:04:21 PM
Last modification on : Wednesday, August 26, 2020 - 5:54:03 PM

Links full text

Identifiers

Collections

Citation

N. Mikuszeit, Olivier Boulle, Ioan Mihai Miron, Kevin Garello, Pietro Gambardella, et al.. Spin-orbit torque driven chiral magnetization reversal in ultrathin nanostructures. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2015, 92 (14), pp.144424. ⟨10.1103/PhysRevB.92.144424⟩. ⟨cea-01734611⟩

Share

Metrics

Record views

439