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Ferromagnetic Interlayer Coupling in CrSBr Crystals Irradiated by Ions.
Fangchao Long1,2, Mahdi Ghorbani-Asl1, Kseniia Mosina3
1Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany.
Nano Letters
|September 5, 2023
Summary
Ion irradiation transforms antiferromagnetic chromium sulfur bromide (CrSBr) into a ferromagnetic material. This transition, observed up to 110 K, is driven by atomic displacements and interstitial formation, paving the way for new spintronic applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Layered magnetic materials are crucial for next-generation spin-based technologies.
- Chromium sulfur bromide (CrSBr) is a notable air-stable van der Waals material with significant magneto-transport and magneto-optical properties.
Purpose of the Study:
- To investigate the magnetic behavior of CrSBr crystals after exposure to high-energy ion irradiation.
- To understand the underlying mechanisms responsible for any observed magnetic transitions.
Main Methods:
- Irradiation of CrSBr crystals with high-energy, non-magnetic ions.
- Magneto-transport and magneto-optical property measurements.
- Structural analysis of irradiated samples.
- Density functional theory (DFT) calculations.
Main Results:
- Observed a transition from antiferromagnetic to ferromagnetic behavior in CrSBr upon ion irradiation.
- Induced remanent magnetization with hysteresis up to 110 K.
- Structural analysis and DFT calculations indicated that atomic displacements and interstitial formation favor ferromagnetic coupling.
Conclusions:
- Ion irradiation is an effective method to engineer the magnetic properties of CrSBr.
- The observed ferromagnetic behavior is attributed to ion-induced structural modifications.
- Findings suggest potential for CrSBr in tunable spintronic devices.
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