Spin orbit torques and Dzyaloshinskii-Moriya interaction in dual-interfaced Co-Ni multilayers

Abstract

We study the spin orbit torque (SOT) and Dzyaloshinskii-Moriya interaction (DMI) in the dual-interfaced Co-Ni perpendicular multilayers. Through the combination of top and bottom layer materials (Pt, Ta, MgO and Cu), SOT and DMI are efficiently manipulated due to an enhancement or cancellation of the top and bottom contributions. However, SOT is found to originate mostly from the bulk of a heavy metal (HM), while DMI is more of interfacial origin. In addition, we find that the direction of the domain wall (DW) motion can be either along or against the electron flow depending on the DW tilting angle when there is a large DMI. Such an abnormal DW motion induces a large assist field required for hysteretic magnetization reversal. Our results provide insight into the role of DMI in SOT driven magnetization switching, and demonstrate the feasibility of achieving desirable SOT and DMI for spintronic devices.

References in corpus (8)

• Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
• Determination of intrinsic spin Hall angle in Pt
• Angular and temperature dependence of current induced spin-orbit effective fields in Ta/CoFeB/MgO nanowires
• High domain wall velocities induced by current in ultrathin Pt/Co/AlOx wires with perpendicular magnetic anisotropy
• Current-induced domain wall motion in a nanowire with perpendicular magnetic anisotropy
• Pinning dependent field driven domain wall dynamics and thermal scaling in an ultrathin Pt/Co/Pt magnetic film
• Current-driven spin orbit field in LaAlO3/SrTiO3 heterostructures
• Spin-orbit torque-driven magnetization switching and thermal effects studied in Ta\CoFeB\MgO nanowires

Cited by in corpus (7)

• Skyrmions in Magnetic Multilayers
• Theory of Dzyaloshinskii domain wall tilt in ferromagnetic nanostrips
• Nonreciprocal spin-wave dynamics in Pt/Co/W/Co/Pt multilayers
• Advanced method for reliable estimation of the spin-orbit torque efficiency in low coercive ferromagnetic multilayers
• Stacking-order effect on spin-orbit torque, spin-Hall magnetoresistance, and magnetic anisotropy in Ni${}_{81}$Fe${}_{19}$-IrO${}_2$ bilayers
• Empirical correlation between the interfacial Dzyaloshinskii Moriya interaction and work function in metallic magnetic trilayers
• Oscillatory spin-orbit torque switching induced by field-like torques