Emission of coherent propagating magnons by insulator-based spin-orbit torque oscillators

M. Evelt (1) , L. Soumah (2) , A. B. Rinkevich (3) , O. Demokritov (1) , A. Anane (2) , V. Cros (2) , Jamal Ben Youssef (4) , G. de Loubens (5) , O. Klein (6) , P. Bortolotti (2) , V.E. E Demidov (1)

1 Physikalisches Institut [Münster]
2 UMPhy CNRS/THALES - Unité mixte de physique CNRS/Thales
3 IMP - M.N. Mikheev Institute of Metal Physics
4 LMB - Laboratoire de magnétisme de Bretagne
5 LNO - Laboratoire Nano-Magnétisme et Oxydes
6 SPINTEC - SPINtronique et TEchnologie des Composants

We experimentally demonstrate generation of coherent propagating magnons in ultra-thin magnetic-insulator films by spin-orbit torque induced by dc electric current. We show that this challenging task can be accomplished by utilizing magnetic-insulator films with large perpendicular magnetic anisotropy. We demonstrate simple and flexible spin-orbit torque devices, which can be used as highly efficient nanoscale sources of coherent propagating magnons for insulator-based spintronic applications.

Domains: Physics [physics]

M. Evelt, L. Soumah, A. B. Rinkevich, O. Demokritov, A. Anane, et al.. Emission of coherent propagating magnons by insulator-based spin-orbit torque oscillators. Physical Review Applied, 2018, 10, pp.041002. ⟨10.1103/PhysRevApplied.10.041002⟩. ⟨cea-01935392⟩