Abstract:
:As an in-plane charge current flows in a heavy metal film with spin-orbit coupling, it produces a torque on and thereby switches the magnetization in a neighbouring ferromagnetic metal film. Such spin-orbit torque (SOT)-induced switching has been studied extensively in recent years and has shown higher efficiency than switching using conventional spin-transfer torque. Here we report the SOT-assisted switching in heavy metal/magnetic insulator systems. The experiments used a Pt/BaFe12O19 bilayer where the BaFe12O19 layer exhibits perpendicular magnetic anisotropy. As a charge current is passed through the Pt film, it produces a SOT that can control the up and down states of the remnant magnetization in the BaFe12O19 film when the film is magnetized by an in-plane magnetic field. It can reduce or increase the switching field of the BaFe12O19 film by as much as about 500 Oe when the film is switched with an out-of-plane field.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Li P,Liu T,Chang H,Kalitsov A,Zhang W,Csaba G,Li W,Richardson D,DeMann A,Rimal G,Dey H,Jiang JS,Porod W,Field SB,Tang J,Marconi MC,Hoffmann A,Mryasov O,Wu Mdoi
10.1038/ncomms12688subject
Has Abstractpub_date
2016-09-01 00:00:00pages
12688issn
2041-1723pii
ncomms12688journal_volume
7pub_type
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