Spin orbit torque switching of synthetic Co/Ir/Co trilayers with perpendicular anisotropy and tunable interlayer coupling

Qinli Ma, Yufan Li, Young-suk Choi, Wei-Chuan Chen, Shu Jen Han, C. L. Chien

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Spin orbit torque (SOT) has attracted much attention as an energy efficient electrical method to switch the magnetization in single magnetic layer with both in-plane and perpendicular anisotropy. Here, we report SOT switching of synthetic antiferromagnetic and ferrimagnetic Co/Ir/Co trilayers, where the net magnetization and the interlayer coupling strength are highly controllable. A weak external field dependence of the SOT switching was observed due to the robust domain wall structure in the trilayer. The switching current density was observed to scale inversely with the net magnetization. For trilayers with the same net magnetization, switching current is independent of the layer order because switching in the thicker Co layer dominates. In both ferromagnetic and antiferromagetic regimes, the switching current reflects the interlayer coupling strength.
Original languageEnglish (US)
Pages (from-to)172403
JournalApplied Physics Letters
Volume117
Issue number17
DOIs
StatePublished - Oct 27 2020
Externally publishedYes

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