Thickness Dependence of Interface-Generated Spin Currents in Ferromagnet/Ti/CoFeB Trilayers

Cited 3 time in webofscience Cited 0 time in scopus
  • Hit : 259
  • Download : 58
Interface-generated spin currents in ferromagnet (FM)/nonmagnet (NM) structures provide both in-plane and out-of-plane spin-orbit torques (SOTs), enabling the field-free switching of perpendicular magnetization of the other FM layer in magnetic trilayers. In this study, the NM thickness dependence of interface-generated spin currents and associated SOTs in FM/Ti/CoFeB trilayers is investigated. In such magnetic trilayers, it is known that the in-plane SOT results from the spin-orbit filtering of the interface-generated spin current, while the out-of-plane SOT is due to the spin-orbit precession. These results show that the polarity of current-induced magnetization switching under an in-plane magnetic field reverses with increasing Ti thickness. This indicates that the sign of the in-plane SOT depends on the current distribution between the bottom FM and Ti layers. On the other hand, field-free switching occurs only for a Ti thickness of up to approximate to 4 nm, and the same polarity is retained, demonstrating that out-of-plane SOT is governed by the charge current flowing near the interface. These results suggest that field-free switching efficiency can be enhanced by engineering the relative conductance of the FM/NM bilayers to constructively combine in-plane and out-of-plane SOTs caused by interface-generated spin currents.
Publisher
WILEY
Issue Date
2022-12
Language
English
Article Type
Article
Citation

ADVANCED MATERIALS INTERFACES, v.9, no.36

DOI
10.1002/admi.202201317
URI
http://hdl.handle.net/10203/303891
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
126935.pdf(2.04 MB)Download
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 3 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0