Charge-to-spin conversion in Bi/Ag bilayer investigated by spin-torque ferromagnetic resonance

• Published in: Journal of magnetism and magnetic materials Vol. 563; p. 169855
• Main Authors: Shen, Jinhui, Xu, Pengchao, Jin, Xiaofeng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-12-2022
• Subjects: Charge-to-spin conversion; Ferromagnetic resonance; Rashba–Edelstein effect; Spin Hall effect; Ferromagnetic resonance; Rashba–Edelstein effect; Charge-to-spin conversion; Spin Hall effect
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2022.169855

The charge-to-spin conversion in Bi/Ag bilayer is studied by spin-torque ferromagnetic resonance experimentally. Fe and permalloy layers sandwich the Bi/Ag bilayer in a multilayer structure, which allows the injection of spin current generated in the Bi/Ag bilayer into the two ferromagnetic layers from opposite directions. The spin Hall effect and the Rashba–Edelstein effect in Bi/Ag are expected to show qualitatively different spin-torque ferromagnetic resonance signals in such a setup. The results show the dominant contribution from the spin Hall effect rather than the Rashba–Edelstein effect, consistent with our recent finding of the spin-to-charge conversion in Bi/Ag bilayer (Shen et al., 2021).
•The charge-to-spin conversion in Bi/Ag bilayer is studied by ST-FMR.•Fe and permalloy layers sandwich the Bi/Ag bilayer in a multilayer structure.•The dominant charge-to-spin conversion in Bi/Ag bilayer is the spin Hall effect.