Switching 2D magnetic states via pressure tuning of layer stacking

The physical properties of two-dimensional van der Waals crystals can be sensitive to interlayer coupling. For two-dimensional magnets , theory suggests that interlayer exchange coupling is strongly dependent on layer separation while the stacking arrangement can even change the sign of the interlay...

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Veröffentlicht in:Nature materials Jg. 18; H. 12; S. 1298 - 1302
Hauptverfasser: Song, Tiancheng, Fei, Zaiyao, Yankowitz, Matthew, Lin, Zhong, Jiang, Qianni, Hwangbo, Kyle, Zhang, Qi, Sun, Bosong, Taniguchi, Takashi, Watanabe, Kenji, McGuire, Michael A, Graf, David, Cao, Ting, Chu, Jiun-Haw, Cobden, David H, Dean, Cory R, Xiao, Di, Xu, Xiaodong
Format: Journal Article
Sprache:Englisch
Veröffentlicht: England Nature Publishing Group 01.12.2019
Schlagworte:
Antiferromagnetism
Coupling
Crystals
Dichroism
Exchanging
Ferromagnetic phases
Ferromagnetism
Graphene
Hydrostatic pressure
Interlayers
Laboratories
Magnetic domains
Magnetic fields
Magnetic properties
Magnetism
Materials science
Microscopy
Physical properties
Physics
Stacking
Tuning
ISSN:1476-1122, 1476-4660, 1476-4660
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Zusammenfassung:The physical properties of two-dimensional van der Waals crystals can be sensitive to interlayer coupling. For two-dimensional magnets , theory suggests that interlayer exchange coupling is strongly dependent on layer separation while the stacking arrangement can even change the sign of the interlayer magnetic exchange, thus drastically modifying the ground state . Here, we demonstrate pressure tuning of magnetic order in the two-dimensional magnet CrI . We probe the magnetic states using tunnelling and scanning magnetic circular dichroism microscopy measurements . We find that interlayer magnetic coupling can be more than doubled by hydrostatic pressure. In bilayer CrI , pressure induces a transition from layered antiferromagnetic to ferromagnetic phase. In trilayer CrI , pressure can create coexisting domains of three phases, one ferromagnetic and two antiferromagnetic. The observed changes in magnetic order can be explained by changes in the stacking arrangement. Such coupling between stacking order and magnetism provides ample opportunities for designer magnetic phases and functionalities.
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ISSN:1476-1122
1476-4660
1476-4660
DOI:10.1038/s41563-019-0505-2