Long Fangchao, Ghorbani-Asl Mahdi, Mosina Kseniia, Li Yi, Lin Kaiman, Ganss Fabian, Hübner René, Sofer Zdenek, Dirnberger Florian, Kamra Akashdeep, Krasheninnikov Arkady V, Prucnal Slawomir, Helm Manfred, Zhou Shengqiang
Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany.
TU Dresden, 01062 Dresden, Germany.
Nano Lett. 2023 Sep 27;23(18):8468-8473. doi: 10.1021/acs.nanolett.3c01920. Epub 2023 Sep 5.
Layered magnetic materials are becoming a major platform for future spin-based applications. Particularly, the air-stable van der Waals compound CrSBr is attracting considerable interest due to its prominent magneto-transport and magneto-optical properties. In this work, we observe a transition from antiferromagnetic to ferromagnetic behavior in CrSBr crystals exposed to high-energy, non-magnetic ions. Already at moderate fluences, ion irradiation induces a remanent magnetization with hysteresis adapting to the easy-axis anisotropy of the pristine magnetic order up to a critical temperature of 110 K. Structure analysis of the irradiated crystals in conjunction with density functional theory calculations suggests that the displacement of constituent atoms due to collisions with ions and the formation of interstitials favors ferromagnetic order between the layers.
层状磁性材料正成为未来基于自旋的应用的主要平台。特别是，空气稳定的范德华化合物CrSBr因其突出的磁输运和磁光特性而备受关注。在这项工作中，我们观察到暴露于高能非磁性离子的CrSBr晶体中从反铁磁行为到铁磁行为的转变。在中等注量下，离子辐照就会诱导出具有磁滞的剩余磁化强度，该磁滞在高达110 K的临界温度下适应原始磁序的易轴各向异性。对辐照晶体的结构分析结合密度泛函理论计算表明，由于与离子碰撞导致的组成原子位移和间隙的形成有利于层间的铁磁序。
