4.6 Article

Shape anisotropy induced field-free switching and enhancement of dampinglike field in Pt/Co/PtMn heterostructures with a wedged ultrathin antiferromagnetic PtMn layer

Journal

PHYSICAL REVIEW B
Volume 108, Issue 5, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.108.054417

Keywords

-

Ask authors/readers for more resources

This study investigates current-induced magnetization switching and dampinglike field in Pt/Co/PtMn trilayer films with a wedged ultrathin antiferromagnetic (AFM) PtMn layer. By breaking the symmetry with the effective shape anisotropy in the wedged AFM PtMn layer, field-free SOT switching is observed. The study finds that the dampinglike field is boosted by up to 30% through wedging the AFM PtMn layer, and the canting of spins caused by the wedge shape accounts for the observed field-free switching and enhancement of SOT efficiency.
Current-induced spin-orbit torque (SOT) switching of perpendicular magnetization requires an additional symmetry breaking, calling for modifications of the conventional SOT devices. Here, we have systematically investigated current-induced magnetization switching and dampinglike field in Pt/Co/PtMn trilayer films with a wedged ultrathin antiferromagnetic (AFM) PtMn layer. The symmetry is broken by the effective shape anisotropy in the wedged ultrathin AFM PtMn layer, resulting in the observed field-free SOT switching. Quantitative characterization manifests that the dampinglike (DL) field is boosted up to 30% through wedging the AFM PtMn layer. Additional experiments with in situ magnetic field and micromagnetic simulations indicate the canting of spins caused by the wedge shape accounts for the observed field-free switching and enhancement of SOT efficiency. Our findings provide an easier approach to field-free switching and HDL enhancing for magnetic memory devices with high density and low power consumption.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available