Tunable multistate field-free switching and ratchet effect by spin-orbit torque in canted ferrimagnetic alloy

Cheng-Hsiang Hsu (), Miela J. Gross, Hannah Calzi Kleidermacher, Shehrin Sayed and Sayeef Salahuddin ()
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Cheng-Hsiang Hsu: University of California
Miela J. Gross: University of California
Hannah Calzi Kleidermacher: University of California
Shehrin Sayed: University of California
Sayeef Salahuddin: University of California

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Spin-orbit torque is not only a useful probe to study manipulation of magnetic textures and magnetic states at the nanoscale but also it carries great potential for next-generation computing applications. Here we report the observation of rich spin-orbit torque switching phenomena such as field-free switching, multistate switching, memristor behavior and ratchet effect in a single shot, co-sputtered, rare earth-transition metal GdxCo100−x. Notably such effects have only been observed in antiferromagnet/ferromagnet bi-layer systems previously. We show that these effects can be traced to a large anistropic canting, that can be engineered into the GdxCo100−x system. Further, we show that the magnitude of these switching phenomena can be tuned by the canting angle and the in-plane external field. The complex spin-orbit torque switching observed in canted GdxCo100−x not only provides a platform for spintronics but also serves as a model system to study the underlying physics of complex magnetic textures and interactions.

Date: 2024
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DOI: 10.1038/s41467-024-52834-0

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