Interfacial control of Dzyaloshinskii-Moriya interaction in heavy metal/ferromagnetic metal thin film heterostructures

Article

关键词: CURRENT-DRIVEN DYNAMICS;    MAGNETIC DOMAIN-WALLS;    SKYRMIONS;    DEPENDENCE;    CHIRALITY;    EXCHANGE;    TORQUE;   

DOI  :  10.1103/PhysRevB.94.180408

来源: SCIE

【 摘 要 】

The interfacial Dzyaloshinskii-Moriya interaction (DMI) in ultrathin magnetic thin film heterostructures provides a new approach for controlling spin textures on mesoscopic length scales. Here we investigate the dependence of the interfacial DMI constant D on a Pt wedge insertion layer in Ta/CoFeB/Pt(wedge)/MgO thin films by observing the asymmetric spin-wave dispersion using Brillouin light scattering. Continuous tuning of D by more than a factor of 3 is realized by inserting less than one monolayer of Pt. The observations provide new insights for designing magnetic thin film heterostructures with tailored D for controlling skyrmions and magnetic domain-wall chirality and dynamics.

【 授权许可】

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