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Title: Current-induced self-switching of perpendicular magnetization in CoPt single layer
Authors: Liu, Liang
Zhou, Chenghang
Zhao, Tieyang
Yao, Bingqing
Zhou, Jing
Shu, Xinyu
Chen, Shaohai
Shi, Shu
Xi, Shibo
Lan, Da
Lin, Weinan
Xie, Qidong
Ren, Lizhu
Luo, Zhaoyang
Sun, Chao
Yang, Ping
Guo, Er-Jia
Dong, Zhili
Manchon, Aurelien
Chen, Jingsheng
Keywords: Engineering::Materials
Issue Date: 2022
Source: Liu, L., Zhou, C., Zhao, T., Yao, B., Zhou, J., Shu, X., Chen, S., Shi, S., Xi, S., Lan, D., Lin, W., Xie, Q., Ren, L., Luo, Z., Sun, C., Yang, P., Guo, E., Dong, Z., Manchon, A. & Chen, J. (2022). Current-induced self-switching of perpendicular magnetization in CoPt single layer. Nature Communications, 13(1), 3539-.
Project: A1983c0036 
MOE-T1-22- 4888-A0001 
Journal: Nature Communications 
Abstract: All-electric switching of perpendicular magnetization is a prerequisite for the integration of fast, high-density, and low-power magnetic memories and magnetic logic devices into electric circuits. To date, the field-free spin-orbit torque (SOT) switching of perpendicular magnetization has been observed in SOT bilayer and trilayer systems through various asymmetric designs, which mainly aim to break the mirror symmetry. Here, we report that the perpendicular magnetization of CoxPt100-x single layers within a special composition range (20 < x < 56) can be deterministically switched by electrical current in the absence of external magnetic field. Specifically, the Co30Pt70 shows the largest out-of-plane effective field efficiency and best switching performance. We demonstrate that this unique property arises from the cooperation of two structural mechanisms: the low crystal symmetry property at the Co platelet/Pt interfaces and the composition gradient along the thickness direction. Compared with that in bilayers or trilayers, the field-free switching in CoxPt100-x single layer greatly simplifies the SOT structure and avoids additional asymmetric designs.
ISSN: 2041-1723
DOI: 10.1038/s41467-022-31167-w
Schools: School of Materials Science and Engineering 
Rights: © 2022 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 licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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