Out-of-plane weak ferromagnetism at room temperature in lattice-distortion non-collinear antiferromagnet of single-crystal Mn_(3)Sn  

作　　者：张博熙 宋平 邓珊珊 娄理 姚森 Bo-Xi Zhang;Ping Song;Shan-Shan Deng;Li Lou;Sen Yao(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)

机构地区：[1]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

出　　处：《Chinese Physics B》2023年第8期428-432,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.52101233 and52071279);the Hebei Natural Science Foundation(Grant No.E2022203010);the China Postdoctoral Science Foundation(Grant No.2022M712685);the Innovation Capability Improvement Project of Hebei Province(Grant No.22567605H)。

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 Mn_(3)Sn 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 Mn_(3)Sn.As a result,the remanent magnetization M_(r)for the deformed sample(0.056μ_(B)/f.u.)is about eleven times that for the pre-deformed sample(0.005μ_(B)/f.u.),and the coercivity(H_(c))increases from 0 k Oe(pre-deformed sample)to 6.02 k Oe(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 

分 类 号：O469[理学—凝聚态物理]