Deterministic Spin-Orbit Torque Induced Magnetization Reversal In Pt/[Co/Ni]n/Co/Ta Multilayer Hall Bars

Spin-orbit torque (SOT) induced by electric current has attracted extensive attention as an efficient method of controlling the magnetization in nanomagnetic structures. SOT-induced magnetization reversal is usually achieved with the aid of an in-plane bias magnetic field. In this paper, we show tha...

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Published inScientific reports Vol. 7; no. 1; pp. 972 - 9
Main Authors Li, Sihua, Goolaup, Sarjoosing, Kwon, Jaesuk, Luo, Feilong, Gan, Weiliang, Lew, Wen Siang
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 20.04.2017
Nature Publishing Group
Nature Portfolio
Subjects
142/126
639/166/987
639/766/119/1001
Humanities and Social Sciences
Magnetic fields
multidisciplinary
Science
Science (multidisciplinary)
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Summary:Spin-orbit torque (SOT) induced by electric current has attracted extensive attention as an efficient method of controlling the magnetization in nanomagnetic structures. SOT-induced magnetization reversal is usually achieved with the aid of an in-plane bias magnetic field. In this paper, we show that by selecting a film stack with weak out-of-plane magnetic anisotropy, field-free SOT-induced switching can be achieved in micron sized multilayers. Using direct current, deterministic bipolar magnetization reversal is obtained in Pt/[Co/Ni] 2 /Co/Ta structures. Kerr imaging reveals that the SOT-induced magnetization switching process is completed via the nucleation of reverse domain and propagation of domain wall in the system.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-01079-7