Giant response to spin-orbit torques in heavy-metal/ferromagnetic bilayers associated with magnetic reversal

A Zaig, S Das, M Shultz, L Klein

Research output: Contribution to journalArticlepeer-review

Abstract

Using bilayer films of-Ta (5 nm)/Ni0.8Fe0.2 (2 nm), we fabricate elliptical structures which exhibit uniaxial magnetic anisotropy, resulting in single magnetic domain behavior. We study induced spin-orbit torques (SOTs) in these devices with first-and second-order harmonic Hall measurements for current flowing along the long axis of the ellipses and external magnetic field applied in the film plane. We observe a giant response to the SOTs associated with magnetization reversal of the NiFe layer, and we correlate it quantitatively with a d phi m/d phi H term, where phi m and phi H are the in-plane angles of the magnetization and the magnetic field, respectively. We discuss theoretical and applicative implications of this intriguing behavior.
Original languageEnglish
Article number214401
Number of pages5
JournalPhysical Review B
Volume106
Issue number21
DOIs
StatePublished - 1 Dec 2022

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© 2022 American Physical Society.

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