Electrical control over perpendicular magnetization switching driven by spin-orbit torques

Abstract

Flexible control of magnetization switching by electrical manners is crucial for applications of spin-orbitronics. Besides of a switching current that is parallel to an applied field, a bias current that is normal to the switching current is introduced to tune the magnitude of effective damping-like and field-like torques and further to electrically control magnetization switching. Symmetrical and asymmetrical control over the critical switching current by the bias current with opposite polarities is both realized in Pt/Co/MgO and $\alpha$-Ta/CoFeB/MgO systems, respectively. This research not only identifies the influences of field-like and damping-like torques on switching process but also demonstrates an electrical method to control it.

arXiv comment8 pages, 6 figures

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Cited by in corpus (7)

• Field-free spin-orbit torque switching enabled by interlayer Dzyaloshinskii-Moriya interaction
• Spin-orbit torque in MgO/CoFeB/Ta/CoFeB/MgO symmetric structure with interlayer antiferromagnetic coupling
• Breaking the current density threshold in spin-orbit-torque magnetic random access memory
• Determination of spin relaxation times in heavy metals via 2nd harmonic spin injection magnetoresistance
• Intrinsic Picosecond Magnetic Switching Mechanism Assisted by an Electric Field in a Synthetic Antiferromagnetic Structure
• Enhanced spin transfer torque in platinum/ferromagnetic-metal structures by optimizing the platinum thickness
• In-situ study of oxygen exposure effect on spin-orbit torque in Pt/Co bilayers in ultrahigh vacuum