Spin-orbit torque in a Ni-Fe single layer

Takeshi Seki, Yong Chang Lau, Satoshi Iihama, Koki Takanashi

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


We evaluated the self-induced spin-orbit torque (SOT) in a single ferromagnetic layer. Spin-torque ferromagnetic resonance (ST-FMR) was measured for the very thin Ni-Fe (permalloy, Py) layers with and without structural inversion symmetry: asymmetric and symmetric Py layers. For both structures, the fieldlike component coming from the Oersted field clearly appeared. On the other hand, the dampinglike component was observed only for asymmetric Py with thickness . This dampinglike torque is attributable to the significant spatial change in the properties of Py. We propose a toy model to analyze the self-induced SOT.

Original languageEnglish
Article number094430
JournalPhysical Review B
Issue number9
Publication statusPublished - 2021 Sept 1


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