Robustness of ferromagnetism in van der Waals magnet Fe3GeTe2 to hydrostatic pressure

doi:10.1088/1674-1056/adb26f

中国物理B ›› 2025, Vol. 34 ›› Issue (4): 46203-046203.doi: 10.1088/1674-1056/adb26f

所属专题： SPECIAL TOPIC — Structures and properties of materials under high pressure

Robustness of ferromagnetism in van der Waals magnet Fe₃GeTe₂ to hydrostatic pressure

Yonglin Wang(王涌霖)¹, Xu-Tao Zeng(曾旭涛)¹, Bo Li(李博)¹, Cheng Su(宿程)¹, Takanori Hattori², Xian-Lei Sheng(胜献雷)¹, and Wentao Jin(金文涛)^1,†

1 School of Physics, Beihang University, Beijing 100191, China;
2 J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan

收稿日期:2024-12-29 修回日期:2025-02-02 接受日期:2025-02-05 出版日期:2025-04-15 发布日期:2025-04-15
通讯作者: Wentao Jin E-mail:wtjin@buaa.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 12074023), the Large Scientific Facility Open Subject of Songshan Lake (Grant No. KFKT2022B05), and the Fundamental Research Funds for the Central Universities in China. Neutron diffraction experiments at the Materials and Life Science Experimental Facility of the J-PARC were performed through the user program (Proposal No. 2023A0185).

Robustness of ferromagnetism in van der Waals magnet Fe₃GeTe₂ to hydrostatic pressure

Yonglin Wang(王涌霖)¹, Xu-Tao Zeng(曾旭涛)¹, Bo Li(李博)¹, Cheng Su(宿程)¹, Takanori Hattori², Xian-Lei Sheng(胜献雷)¹, and Wentao Jin(金文涛)^1,†

1 School of Physics, Beihang University, Beijing 100191, China;
2 J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan

Received:2024-12-29 Revised:2025-02-02 Accepted:2025-02-05 Online:2025-04-15 Published:2025-04-15
Contact: Wentao Jin E-mail:wtjin@buaa.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 12074023), the Large Scientific Facility Open Subject of Songshan Lake (Grant No. KFKT2022B05), and the Fundamental Research Funds for the Central Universities in China. Neutron diffraction experiments at the Materials and Life Science Experimental Facility of the J-PARC were performed through the user program (Proposal No. 2023A0185).

摘要/Abstract

摘要： Two-dimensional van der Waals ferromagnet Fe$_3$GeTe$_2$ (FGT) holds a great potential for applications in spintronic devices due to its high Curie temperature, easy tunability, and excellent structural stability in air. Theoretical studies have shown that pressure, as an external parameter, significantly affects its ferromagnetic properties. In this study, we have performed comprehensive high-pressure neutron powder diffraction (NPD) experiments on FGT up to 5 GPa to investigate the evolution of its structural and magnetic properties with hydrostatic pressure. The NPD data clearly reveal the robustness of the ferromagnetism in FGT, despite of an apparent suppression by hydrostatic pressure. As the pressure increases from 0 to 5 GPa, the Curie temperature is found to decrease monotonically from 225(5) K to 175(5) K, together with a dramatically suppressed ordered moment of Fe, which is well supported by the first-principles calculations. Although no pressure-driven structural phase transition is observed up to 5 GPa, quantitative analysis on the changes of bond lengths and bond angles indicates a significant modification of the exchange interactions, which accounts for the pressure-induced suppression of the ferromagnetism in FGT.

关键词: van der Waals material, ferromagnetism, hydrostatic pressure, neutron diffraction

Abstract: Two-dimensional van der Waals ferromagnet Fe$_3$GeTe$_2$ (FGT) holds a great potential for applications in spintronic devices due to its high Curie temperature, easy tunability, and excellent structural stability in air. Theoretical studies have shown that pressure, as an external parameter, significantly affects its ferromagnetic properties. In this study, we have performed comprehensive high-pressure neutron powder diffraction (NPD) experiments on FGT up to 5 GPa to investigate the evolution of its structural and magnetic properties with hydrostatic pressure. The NPD data clearly reveal the robustness of the ferromagnetism in FGT, despite of an apparent suppression by hydrostatic pressure. As the pressure increases from 0 to 5 GPa, the Curie temperature is found to decrease monotonically from 225(5) K to 175(5) K, together with a dramatically suppressed ordered moment of Fe, which is well supported by the first-principles calculations. Although no pressure-driven structural phase transition is observed up to 5 GPa, quantitative analysis on the changes of bond lengths and bond angles indicates a significant modification of the exchange interactions, which accounts for the pressure-induced suppression of the ferromagnetism in FGT.

Key words: van der Waals material, ferromagnetism, hydrostatic pressure, neutron diffraction

中图分类号: (High-pressure effects in solids and liquids)

62.50.-p

68.65.-k (Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties) 75.50.-y (Studies of specific magnetic materials) 61.05.F- (Neutron diffraction and scattering)

Yonglin Wang(王涌霖), Xu-Tao Zeng(曾旭涛), Bo Li(李博), Cheng Su(宿程), Takanori Hattori, Xian-Lei Sheng(胜献雷), and Wentao Jin(金文涛). Robustness of ferromagnetism in van der Waals magnet Fe₃GeTe₂ to hydrostatic pressure[J]. 中国物理B, 2025, 34(4): 46203-046203.

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Robustness of ferromagnetism in van der Waals magnet Fe₃GeTe₂ to hydrostatic pressure

Robustness of ferromagnetism in van der Waals magnet Fe₃GeTe₂ to hydrostatic pressure

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