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Title: Modulating above-room-temperature magnetism in Ga-implanted Fe5GeTe2 van der Waals magnets

Abstract

The creation of van der Waals (vdW) ferromagnets with tunable Curie temperature (TC) and magnetic anisotropy is essential in developing vdW magnet-based devices. Here, we report an effective and reliable method for modulating the magnetic properties of vdW Fe5GeTe2 by site-specific Ga+ implantation. In this study, we report an easy axis in the ab-plane for bulk Fe5GeTe2 (TC = 310 K) and an axis out of the plane for thin Fe5GeTe2 flakes (TC = 290 K). Combining element-resolved photoemission electron microscopy and spatially resolved magneto-optic Kerr microscopy, we find that the implantation of a tiny amount of 10–3 Ga+·Å–3 in Fe5GeTe2 greatly enhances the TC from 290 to 360 K and switches the magnetic easy axis from the out-of-plane c axis to the ab-plane. The room-temperature x-ray magnetic circular dichroism signal is enhanced from 0% to 9% at an implantation level of 10–2 Ga+·Å–3. These results provide new opportunities for tailoring the magnetic properties of vdW materials beyond room temperature.

Authors:
 [1];  [1];  [2];  [3];  [4];  [1];  [1];  [1];  [1];  [1];  [2];  [5]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [4]; ORCiD logo [2]; ORCiD logo [1]
  1. University of Science and Technology of China, Anhui (China)
  2. Anhui University (China)
  3. Chinese Academy of Sciences, Dalian (China)
  4. University of California, Berkeley, CA (United States)
  5. Anhui University, Hefei (China)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Fundamental Research Funds for the Central Universities; USTC Research Funds of the Double First-Class Initiative; National Natural Science Foundation of China (NSFC); National Research Foundation of Korea (NRF)
OSTI Identifier:
2234053
Grant/Contract Number:  
AC02-05CH11231; wk2310000104; YD2140002004; 12174364; 12104003; 12241406; 2015M3D1A1070467; 2015R1A5A1009962
Resource Type:
Accepted Manuscript
Journal Name:
APL Materials
Additional Journal Information:
Journal Volume: 11; Journal Issue: 9; Journal ID: ISSN 2166-532X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Ferromagnetic resonance; Magnetic anisotropy; Magnetic ordering; X-ray magnetic circular dichroism spectroscopy; Ferromagnetic materials; Photoemission electron microscopy; Kerr microscopy; Magnetic nanostructures

Citation Formats

Yuan, Yanan, Liu, Daxiang, Yu, Jingjing, Zhang, Guanhua, Chen, Xiang, Liu, Ruiqi, Wang, Siyu, Pei, Fangfang, Wei, Long, Li, Zhi, Guo, Junming, Wang, Shouguo, Liao, Zhaoliang, Yan, Wensheng, Qiu, Ziqiang, Yang, Mengmeng, and Li, Qian. Modulating above-room-temperature magnetism in Ga-implanted Fe5GeTe2 van der Waals magnets. United States: N. p., 2023. Web. doi:10.1063/5.0168468.
Yuan, Yanan, Liu, Daxiang, Yu, Jingjing, Zhang, Guanhua, Chen, Xiang, Liu, Ruiqi, Wang, Siyu, Pei, Fangfang, Wei, Long, Li, Zhi, Guo, Junming, Wang, Shouguo, Liao, Zhaoliang, Yan, Wensheng, Qiu, Ziqiang, Yang, Mengmeng, & Li, Qian. Modulating above-room-temperature magnetism in Ga-implanted Fe5GeTe2 van der Waals magnets. United States. https://doi.org/10.1063/5.0168468
Yuan, Yanan, Liu, Daxiang, Yu, Jingjing, Zhang, Guanhua, Chen, Xiang, Liu, Ruiqi, Wang, Siyu, Pei, Fangfang, Wei, Long, Li, Zhi, Guo, Junming, Wang, Shouguo, Liao, Zhaoliang, Yan, Wensheng, Qiu, Ziqiang, Yang, Mengmeng, and Li, Qian. Fri . "Modulating above-room-temperature magnetism in Ga-implanted Fe5GeTe2 van der Waals magnets". United States. https://doi.org/10.1063/5.0168468. https://www.osti.gov/servlets/purl/2234053.
@article{osti_2234053,
title = {Modulating above-room-temperature magnetism in Ga-implanted Fe5GeTe2 van der Waals magnets},
author = {Yuan, Yanan and Liu, Daxiang and Yu, Jingjing and Zhang, Guanhua and Chen, Xiang and Liu, Ruiqi and Wang, Siyu and Pei, Fangfang and Wei, Long and Li, Zhi and Guo, Junming and Wang, Shouguo and Liao, Zhaoliang and Yan, Wensheng and Qiu, Ziqiang and Yang, Mengmeng and Li, Qian},
abstractNote = {The creation of van der Waals (vdW) ferromagnets with tunable Curie temperature (TC) and magnetic anisotropy is essential in developing vdW magnet-based devices. Here, we report an effective and reliable method for modulating the magnetic properties of vdW Fe5GeTe2 by site-specific Ga+ implantation. In this study, we report an easy axis in the ab-plane for bulk Fe5GeTe2 (TC = 310 K) and an axis out of the plane for thin Fe5GeTe2 flakes (TC = 290 K). Combining element-resolved photoemission electron microscopy and spatially resolved magneto-optic Kerr microscopy, we find that the implantation of a tiny amount of 10–3 Ga+·Å–3 in Fe5GeTe2 greatly enhances the TC from 290 to 360 K and switches the magnetic easy axis from the out-of-plane c axis to the ab-plane. The room-temperature x-ray magnetic circular dichroism signal is enhanced from 0% to 9% at an implantation level of 10–2 Ga+·Å–3. These results provide new opportunities for tailoring the magnetic properties of vdW materials beyond room temperature.},
doi = {10.1063/5.0168468},
journal = {APL Materials},
number = 9,
volume = 11,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 2023},
month = {Fri Sep 01 00:00:00 EDT 2023}
}

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