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Tunable In-Plane Anomalous Hall and Magneto-Optical Kerr Effects via Stacking Engineering in Two-Dimensional Magnets.

Yuantao Chen1, Wenxin Jiang1, M Umar Farooq1

  • 1Department of Physics and Guangdong Basic Research Center of Excellence for Quantum Science, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.

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|October 31, 2025
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Summary
This summary is machine-generated.

Researchers engineered two-dimensional magnetic bilayers to control the in-plane anomalous Hall effect (IPAHE) and magneto-optical Kerr effect (MOKE). Adjusting stacking and spin orientation offers a new way to tune these spintronic functionalities.

Keywords:
2D materialsKerr effectaltermagnetismferroelectricityin-plane anomalous Hall effect

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • The in-plane anomalous Hall effect (IPAHE) and magneto-optical Kerr effect (MOKE) are key spintronic functionalities.
  • Achieving and controlling these effects in 2D magnetic systems is difficult due to symmetry limitations.

Purpose of the Study:

  • To develop a general framework for achieving and modulating IPAHE and MOKE in 2D magnetic bilayers.
  • To explore the influence of interlayer sliding and spin-orientation engineering on these effects.

Main Methods:

  • Symmetry analysis
  • First-principles calculations
  • Utilized ferromagnetic (FM) CrPSe4 and antiferromagnetic (AFM) MPSe3 (M = Mn, Cr) as prototype systems.

Main Results:

  • Demonstrated that modifying stacking order and spin orientation can selectively control system symmetries.
  • Showed that these modifications effectively tune the presence and sign of IPAHE and MOKE.
  • Established a symmetry-protected coupling between spin, stacking, and electronic response.

Conclusions:

  • A practical approach to achieve tunable IPAHE and MOKE in 2D magnetic systems has been established.
  • This work provides a pathway for developing advanced magneto-optical devices and spintronic memory applications.