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

Hsu, Cheng-Hsiang; Gross, Miela J.; Kleidermacher, Hannah Calzi; Sayed, Shehrin; Salahuddin, Sayeef

doi:10.1038/s41467-024-52834-0

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

Journal Article · 07 October 2024 · Nature Communications

DOI: https://doi.org/10.1038/s41467-024-52834-0 · OSTI ID:2466308

^[1];

^[2];

^[2]; Sayed, Shehrin ^[1]; Salahuddin, Sayeef ^[1]

University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
University of California, Berkeley, CA (United States)

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 Gd_xCo_100-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 Gd_xCo_100-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 Gd_xCo_100-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.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2466308

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 15; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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

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