Out-of-plane weak ferromagnetism at room temperaturein lattice-distortion non-collinear antiferromagnet of single-crystal Mn3Sn

doi:10.1088/1674-1056/acca0b

中国物理B ›› 2023, Vol. 32 ›› Issue (8): 87502-087502.doi: 10.1088/1674-1056/acca0b

Out-of-plane weak ferromagnetism at room temperaturein lattice-distortion non-collinear antiferromagnet of single-crystal Mn₃Sn

Bo-Xi Zhang(张博熙), Ping Song(宋平)^†, Shan-Shan Deng(邓珊珊), Li Lou(娄理), and Sen Yao(姚森)

State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China

收稿日期:2023-01-20 修回日期:2023-03-23 出版日期:2023-07-14 发布日期:2023-07-26
通讯作者: Ping Song E-mail:psong@ysu.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China(Grant Nos.52101233 and 52071279), the Hebei Natural Science Foundation(Grant No.E2022203010), the China Postdoctoral Science Foundation (Grant No.2022M712685),and the Innovation Capability Improvement Project of Hebei Province (Grant No.22567605H).

Out-of-plane weak ferromagnetism at room temperaturein lattice-distortion non-collinear antiferromagnet of single-crystal Mn₃Sn

Bo-Xi Zhang(张博熙), Ping Song(宋平)^†, Shan-Shan Deng(邓珊珊), Li Lou(娄理), and Sen Yao(姚森)

State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China

Received:2023-01-20 Revised:2023-03-23 Online:2023-07-14 Published:2023-07-26
Supported by:
This work was supported by the National Natural Science Foundation of China(Grant Nos.52101233 and 52071279), the Hebei Natural Science Foundation(Grant No.E2022203010), the China Postdoctoral Science Foundation (Grant No.2022M712685),and the Innovation Capability Improvement Project of Hebei Province (Grant No.22567605H).

摘要/Abstract

摘要： Out-of-plane weak ferromagnetic (OWFM) spin arrangements with topological properties can realize a series of interesting physical properties. However, this spin structure tends to exist at low temperatures. The OWFM structure can also be induced at room temperature by hydrostatic pressure, whereas this isotropic approach tends to form helical AFM structures. We report the OWFM spin arrangement in single crystal Mn₃Sn by an anisotropic strategy of high-stressconstrained compression deformation at room temperature. Both experimental and theoretical simulation results show that the alignment of the OWFM spin structure is due to the distortion of the atomic scale caused by the strain energy during deformation. The OWFM spin arrangement can significantly change the magnetic property of Mn₃Sn. As a result, the remanent magnetization M_r for the deformed sample (0.056 μ_B/f.u.) is about eleven times that for the pre-deformed sample (0.005 μ_B/f.u.), and the coercivity (H_c) increases from 0 kOe (pre-deformed sample) to 6.02 kOe (deformed sample). Our findings provide a way to generate the OWFM spin structure at room temperature and may give fresh ideas for creating antiferromagnetic materials with excellent physical properties.

关键词: non-collinear antiferromagnet, high-stress-constrained compression deformation, lattice distortion

Abstract: Out-of-plane weak ferromagnetic (OWFM) spin arrangements with topological properties can realize a series of interesting physical properties. However, this spin structure tends to exist at low temperatures. The OWFM structure can also be induced at room temperature by hydrostatic pressure, whereas this isotropic approach tends to form helical AFM structures. We report the OWFM spin arrangement in single crystal Mn₃Sn by an anisotropic strategy of high-stressconstrained compression deformation at room temperature. Both experimental and theoretical simulation results show that the alignment of the OWFM spin structure is due to the distortion of the atomic scale caused by the strain energy during deformation. The OWFM spin arrangement can significantly change the magnetic property of Mn₃Sn. As a result, the remanent magnetization M_r for the deformed sample (0.056 μ_B/f.u.) is about eleven times that for the pre-deformed sample (0.005 μ_B/f.u.), and the coercivity (H_c) increases from 0 kOe (pre-deformed sample) to 6.02 kOe (deformed sample). Our findings provide a way to generate the OWFM spin structure at room temperature and may give fresh ideas for creating antiferromagnetic materials with excellent physical properties.

Key words: non-collinear antiferromagnet, high-stress-constrained compression deformation, lattice distortion

中图分类号: (Metals and alloys)

75.47.Np

75.30.Gw (Magnetic anisotropy) 75.50.Ee (Antiferromagnetics)

Bo-Xi Zhang(张博熙), Ping Song(宋平), Shan-Shan Deng(邓珊珊), Li Lou(娄理), and Sen Yao(姚森). Out-of-plane weak ferromagnetism at room temperaturein lattice-distortion non-collinear antiferromagnet of single-crystal Mn₃Sn[J]. 中国物理B, 2023, 32(8): 87502-087502.

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Out-of-plane weak ferromagnetism at room temperaturein lattice-distortion non-collinear antiferromagnet of single-crystal Mn₃Sn

Out-of-plane weak ferromagnetism at room temperaturein lattice-distortion non-collinear antiferromagnet of single-crystal Mn₃Sn

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