Journal Article

FZJ-2026-03275

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Inductive detection of inverse spin-orbit torques in magnetic heterostructures

Yaqoob, M. (Corresponding author) ; Kammerbauer, F. ; Saunderson, T.FZJ* ; Vasyuchka, V. I. ; Go, D.FZJ* ; Al-Hamdo, H. ; Jakob, G. ; Mokrousov, Y.FZJ* ; Kläui, M. ; Weiler, M.

2024
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevB.110.104432

Abstract: The manipulation of magnetization via magnetic torques is one of the most important phenomena in spintronics. In thin films, conventionally, a charge current flowing in a heavy metal is used to generate transverse spin currents and to exert torques on the magnetization of an adjacent ferromagnetic thin film layer. Here, in contrast to the typically employed heavy metals, we study spin-to-charge conversion in ferromagnetic heterostructures with large spin-orbit interaction that function as the torque-generating layers. In particular, we chose perpendicular magnetic anisotropy (PMA) multilayers [Co/Ni] and [Co/Pt] as the torque-generating layers and drive magnetization dynamics in metallic ferromagnetic thin film Co20Fe60B20 (CoFeB) layers with in-plane magnetic anisotropy (IMA). We investigate the spin dynamics driven by spin-orbit torque (SOT) and the concomitant charge current generation by the inverse SOT process using an inductive technique based on a vector network analyzer. In our experimental findings, we find that the SOTs generated by our multilayers are of a magnitude comparable to those produced by Pt, consistent with first- principles calculations. Furthermore, we noted a significant correlation between the SOT and the thickness of the CoFeB layer.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)
2. DFG project G:(GEPRIS)458361602 - Spin+Drehmoment: Spin-Bahn Dynamik in magnetischen Hybriden (B13) (458361602) (458361602)
3. DFG project G:(GEPRIS)437337265 - Spin+AFM-Dynamik: Antiferromagnetismus durch Drehimpulsströme und Gitterdynamik (A11) (437337265) (437337265)
4. DFG project G:(GEPRIS)290319996 - Spin+Bahn-Wechselwirkung: Orbitronik und Spin-Bahn Effekte (A01) (290319996) (290319996)
5. DFG project G:(GEPRIS)290396061 - Spin+Strom: Drehimpulstransport durch Magnonen, Spins und Orbits (B02) (290396061) (290396061)

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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