Tunable multistate field-free switching and ratchet effect by spin-orbit torque in canted ferrimagnetic alloy.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39379358.
- Also identified by DOI 10.1038/s41467-024-52834-0 and PMC identifier 11461957.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
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 Gd<sub>x</sub>Co<sub>100-x</sub>. 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<sub>x</sub>Co<sub>100-x</sub> 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<sub>x</sub>Co<sub>100-x</sub> 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.