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

doi:10.1088/1674-1056/acca0b

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.

Keywords: non-collinear antiferromagnet high-stress-constrained compression deformation lattice distortion

Received: 20 January 2023
Revised: 23 March 2023
Accepted manuscript online:

PACS:	75.47.Np	(Metals and alloys)
	75.30.Gw	(Magnetic anisotropy)
	75.50.Ee	(Antiferromagnetics)

Fund: 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).

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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 2023 Chin. Phys. B 32 087502

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

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