Spin-orbit torques and their angular dependence in ferromagnet/normal metal heterostructures

Hyung Keun Gweon, Kyung Jin Lee, Sang Ho Lim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Spin-orbit torques (SOTs) are investigated for various elements of X (Pt, Ru, Pd, Cu, Mo, W, and Ta) in Pt/Co/X heterostructures. We find that both the angle-independent and angle-dependent torque components are strongly dependent on the choice of X. Large negative anisotropic SOTs are observed for elements exhibiting high SOT efficiencies (such as X = Ta or W), the behavior of which is detrimental to device applications, thus requiring us to understand the underlying physics behind the anisotropic torques. Our careful analysis shows that angle-dependent torques are closely correlated with the work function difference between Co and X, indicating that the interfacial Rashba spin-orbit coupling plays a role in the anisotropy of SOTs.

Original languageEnglish
Article number122405
JournalApplied Physics Letters
Issue number12
Publication statusPublished - 2019 Sept 16

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Spin-orbit torques and their angular dependence in ferromagnet/normal metal heterostructures'. Together they form a unique fingerprint.

Cite this