Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Physical review. B, 2018-07, Vol.98 (2), p.024419, Article 024419
2018
Volltextzugriff (PDF)

Details

Autor(en) / Beteiligte
Titel
Spin-orbit torques and tunable Dzyaloshinskii-Moriya interaction in Co/Cu/Co trilayers
Ist Teil von
  • Physical review. B, 2018-07, Vol.98 (2), p.024419, Article 024419
Ort / Verlag
College Park: American Physical Society
Erscheinungsjahr
2018
Quelle
American Physical Society Journals
Beschreibungen/Notizen
  • We study the spin-orbit torques (SOTs) in Co/Cu/Co magnetic trilayers based on first-principles density-functional theory calculations in the case where the applied electric field lies in-plane, i.e., parallel to the interfaces. We assume that the bottom Co layer has a fixed in-plane magnetization, while the top Co layer can be switched. We find that the SOT on the top ferromagnet can be controlled by the bottom ferromagnet because of the nonlocal character of the SOT in this system. As a consequence the SOT is anisotropic, i.e., its magnitude varies with the direction of the applied electric field. We show that the Dzyaloshinskii-Moriya interaction (DMI) in the top layer is anisotropic as well, i.e., the spin-spiral wavelength of spin spirals in the top layer depends on their in-plane propagation direction. This effect suggests that DMI can be tuned easily in magnetic trilayers via the magnetization direction of the bottom layer. In order to understand the influence of the bottom ferromagnet on the SOTs and the DMI of the top ferromagnet, we study these effects in Co/Cu magnetic bilayers for comparison. We find the SOTs and the DMI to be surprisingly large despite the small spin-orbit interaction of Cu.
Sprache
Englisch
Identifikatoren
ISSN: 2469-9950
eISSN: 2469-9969
DOI: 10.1103/PhysRevB.98.024419
Titel-ID: cdi_crossref_primary_10_1103_PhysRevB_98_024419

Weiterführende Literatur

Empfehlungen zum selben Thema automatisch vorgeschlagen von bX