Collective skyrmion motion under the influence of an additional interfacial spin-transfer torque.

ABSTRACT: Here we study the effect of an additional interfacial spin-transfer torque, as well as the well-established spin-orbit torque and bulk spin-transfer torque, on skyrmion collections-group of skyrmions dense enough that they are not isolated from one another-in ultrathin heavy metal/ferromagnetic multilayers, by comparing modelling with experimental results. Using a skyrmion collection with a range of skyrmion diameters and landscape disorder, we study the dependence of the skyrmion Hall angle on diameter and velocity, as well as the velocity as a function of diameter. We show that inclusion of the interfacial spin-transfer torque results in reduced skyrmion Hall angles, with values close to experimental results. We also show that for skyrmion collections the velocity is approximately indepe

SUBMITTER: MacKinnon CR 

PROVIDER: S-EPMC9232533 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature