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Direct Imaging of Antiferromagnet-Ferromagnet Phase Transition in van der Waals Antiferromagnet CrSBr

Journal Article · · Advanced Functional Materials
The advent of van der Waals (vdW) ferromagnetic (FM) and antiferromagnetic (AFM) materials offers unprecedented opportunities for spintronics and magneto-optic devices. Combining magnetic Kerr microscopy and density functional theory calculations, the AFM-FM transition is investigated and a surprising abnormal magneto-optic anisotropy in vdW CrSBr associated with different magnetic phases (FM, AFM, or paramagnetic state) is discovered. This unique magneto-optic property leads to different anisotropic optical reflectivity from different magnetic states, permitting direct imaging of the AFM Néel vector orientation and the dynamic process of the AFM-FM transition within a magnetic field. Using Kerr microscopy, not only the domain nucleation and propagation process is imaged but also the intermediate spin-flop state in the AFM-FM transition is identified. In conclusion, the unique magneto-optic property and clear identification of the dynamics process of the AFM-FM phase transition in CrSBr demonstrate the promise of vdW magnetic materials for future spintronic technology.
Research Organization:
University of California, Berkeley, CA (United States)
Sponsoring Organization:
Fundamental Research Funds for the Central Universities; King Abdullah University of Science and Technology (KAUST); National Key R&D Program of China; National Natural Science Foundation of China; National Research Foundation of Korea; Open Funds of Hefei National Research Center for Physical Sciences at the Microscale; Science Research Center Program through the National Research Foundation of Korea; Strategic Priority Research Program of Chinese Academy of Sciences; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USTC Research Funds of the Double First-Class Initiative; Users with Excellence Program of Hefei Science Center CAS; van der Waals heterostructures program
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2422585
Alternate ID(s):
OSTI ID: 2007087
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 2 Vol. 34; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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