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|Title:||High velocity domain wall propagation using voltage controlled magnetic anisotropy||Authors:||Tan, Fu Nan
Gan, Wei Liang
Ang, Calvin Ching Ian
Liu, H. X.
Lew, Wen Siang
Wong, G. D. H.
|Issue Date:||2019||Source:||Tan, F. N., Gan, W. L., Ang, C. C. I., Wong, G. D. H., Liu, H. X., Poh, F., & Lew, W. S. (2019). High velocity domain wall propagation using voltage controlled magnetic anisotropy. Scientific Reports, 9(1), 7369-. doi:10.1038/s41598-019-43843-x||Series/Report no.:||Scientific Reports||Abstract:||The use of voltage-controlled magnetic anisotropy (VCMA) via the creation of a sloped electric field has been hailed as an energy-efficient approach for domain wall (DW) propagation. However, this method suffers from a limitation of the nanowire length which the DW can propagate on. Here, we propose the use of multiplexed gate electrodes to propagate DWs on magnetic nanowires without having any length constraints. The multi-gate electrode configuration is demonstrated using micromagnetic simulations. This allows controllable voltages to be applied to neighboring gate electrodes, generating large strength of magnetic anisotropy gradients along the nanowire, and the results show that DW velocities higher than 300 m/s can be achieved. Analysis of the DW dynamics during propagation reveals that the tilt of the DW and the direction of slanted gate electrode greatly alters the steady state DW propagation. Our results show that chevron-shaped gate electrodes is an effective optimisation that leads to multi-DW propagation with high velocity. Moreover, a repeating series of high-medium-low magnetic anisotropy regions enables a deterministic VCMA-controlled high velocity DW propagation.||URI:||https://hdl.handle.net/10356/106583
|DOI:||10.1038/s41598-019-43843-x||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 http://creativecommons.org/licenses/by/4.0/.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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