Magnetic Domain Wall Energy Landscape Engineering in a Ferrimagnet

Architectures based on a magnetic domain wall (DW) can store and process information at a high speed in a nonvolatile manner with ultra-low power consumption. Recently, transition-metal rare earth metal alloy-based ferrimagnets have attracted a considerable amount of attention for the ultrafast current-driven DW motion. However, the high-speed DW motion is subject to film inhomogeneity and device edge defects, causing challenges in controlling the DW motion and hindering practical application. In this work, we demonstrate a strategy for precisely engineering the DW energy landscape by locally modifying the compensation state in a ferrimagnet via ion irradiation by using the focused ion beam technique. A diode-like DW motion behavior is observed at the lateral junction interface, i.e., the boundary between irradiated and non-irradiated CoGd, enabling selective control over DW pinning and depinning at specific locations. Our work provides insight into the development of next-generation DW-based ferrimagnetic racetrack memory and logic devices.

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Publication Details

Journal
Nano Letters
Published
2024-12-26
DOI
https://doi.org/10.1021/acs.nanolett.4c04916
Citations
5
Primary Topic
Magnetic properties of thin films
Type
article
Field-Weighted Citation Impact
1.69

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article

Magnetic Domain Wall Energy Landscape Engineering in a Ferrimagnet

Shuai Ning, Zhaochu Luo, Feng Luo, Leran Wang et al.
5 citations
Nano Letters
Magnetic properties of thin films
1.69
article

Magnetic Domain Wall Energy Landscape Engineering in a Ferrimagnet

Shuai Ning, Zhaochu Luo, Feng Luo, Leran Wang, Peixin Qin, Jinbo Yang, Xiaoxiao Fang, Rui Yao, Yifei Ma, Zhiqi Liu, Fengbo Yan, Miao Meng
article en
5 citations

Abstract

Architectures based on a magnetic domain wall (DW) can store and process information at a high speed in a nonvolatile manner with ultra-low power consumption. Recently, transition-metal rare earth metal alloy-based ferrimagnets have attracted a considerable amount of attention for the ultrafast current-driven DW motion. However, the high-speed DW motion is subject to film inhomogeneity and device edge defects, causing challenges in controlling the DW motion and hindering practical application. In this work, we demonstrate a strategy for precisely engineering the DW energy landscape by locally modifying the compensation state in a ferrimagnet via ion irradiation by using the focused ion beam technique. A diode-like DW motion behavior is observed at the lateral junction interface, i.e., the boundary between irradiated and non-irradiated CoGd, enabling selective control over DW pinning and depinning at specific locations. Our work provides insight into the development of next-generation DW-based ferrimagnetic racetrack memory and logic devices.

Nano LettersVol. 25(1)
Peking University (CN), Nankai University (CN), Division of Materials Science and Engineering (AU), Beihang University (CN)
China Association for Science and Technology, National Natural Science Foundation of China, China Postdoctoral Science Foundation, Nankai University, Peking University, Beijing Municipal Natural Science Foundation, National Postdoctoral Program for Innovative Talents, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities
Openalex Percentile: Top 15%
Magnetic properties of thin films
1.69
DOISourceOpenAlex
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