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Title: Dependence of spin-orbit torque effective fields on magnetization uniformity in Ta/Co/Pt structure
Authors: Luo, Feilong
Wong, Qi Ying
Li, Sihua
Tan, Funan
Lim, Gerard Joseph
Wang, Xuan
Lew, Wen Siang
Keywords: Torque
Magnetic Uniformity
Issue Date: 2019
Source: Luo, F., Wong, Q. Y., Li, S., Tan, F., Lim, G. J., Wang, X., & Lew, W. S. (2019). Dependence of spin-orbit torque effective fields on magnetization uniformity in Ta/Co/Pt structure. Scientific Reports, 9. 10776-. doi:10.1038/s41598-019-47125-4
Series/Report no.: Scientific Reports
Abstract: The spin-orbit torque (SOT) effective fields, namely field-like and damping-like terms, depend on the thicknesses of heavy metal (HM) and ferromagnetic metal (FM) layers, in a stack comprising of HM/FM/HM or oxide. In this work, we report on the dependence of the SOT effective fields on the magnetization uniformity in the wires comprising of Ta/Co/Pt layer structure. SOT dependence on magnetization uniformity dependence was investigated by concurrent variation of the magnetization uniformity in Co layer and characterization of the SOT effective fields in each wire which excludes the layer thickness dependence influences. Our experimental results reveal that the field-like term decreases while the damping-like term increases with increasing Co magnetization uniformity. The magnetization uniformity influence on the effective fields is attributed to the spin Hall effect, which contributes to the SOT.
DOI: 10.1038/s41598-019-47125-4
Rights: © 2019 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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