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Title: Role of RKKY torque on domain wall motion in synthetic antiferromagnetic nanowires with opposite spin Hall angles
Authors: Krishnia, Sachin
Sethi, Pankaj
Gan, Wei Liang
Kholid, Farhan Nur
Purnama, Indra
Ramu, Maddu
Herng, Tun Seng
Ding, Jun
Lew, Wen Siang
Keywords: Synthetic Antiferromagnetic
Hall Angle
Issue Date: 2017
Source: Krishnia, S., Sethi, P., Gan, W. L., Kholid, F. N., Purnama, I., Ramu, M., . . . Lew, W. S. (2017). Role of RKKY torque on domain wall motion in synthetic antiferromagnetic nanowires with opposite spin Hall angles. Scientific Reports, 7, 11715-. doi:10.1038/s41598-017-11733-9
Series/Report no.: Scientific Reports
Abstract: We experimentally show the effect of enhanced spin-orbit and RKKY induced torques on the current-induced motion of a pair of domain walls (DWs), which are coupled antiferromagnetically in synthetic antiferromagnetic (SAF) nanowires. The torque from the spin Hall effect (SHE) rotates the Néel DWs pair into the transverse direction, which is due to the fact that heavy metals of opposite spin Hall angles are deposited at the top and the bottom ferromagnetic interfaces. The rotation of both DWs in non-collinear fashion largely perturbs the antiferromagnetic coupling, which in turn stimulates an enhanced interlayer RKKY exchange torque that improved the DW velocity. The interplay between the SHE-induced torque and the RKKY exchange torque is validated via micromagnetic simulations. In addition, the DW velocity can be further improved by increasing the RKKY exchange strength.
ISSN: 2045-2322
DOI: 10.1038/s41598-017-11733-9
Rights: © 2017 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. Te 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
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