Tuning the spin-orbit torque effective fields by varying Pt insertion layer thickness in perpendicularly magnetized Pt/Co/Pt(t)/Ta structures

• Main Authors: Li, S. H., Lim, Gerard Joseph, Gan, Weiliang, Law, Wai Cheung, Tan, Funan, Lew, Wen Siang
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2021
• Subjects: Science::Physics; Spin-orbit Torque; Damping-like Term
• Online Access: https://hdl.handle.net/10356/146852
• Institution: Nanyang Technological University

We experimentally determine that a Pt layer insertion between the Co/Ta interface can effectively negate the field-like spin-orbit torque (SOT) in perpendicularly magnetized Pt/Co/Pt(t)/Ta structures, as the Rashba effects at the Pt/Co and Co/Pt interfaces counteract each other. The damping-like ter...