Controlling ferromagnetic easy axis in a layered MoS2 single crystal

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Molybdenum disulfide (MoS2) is a 2D material with potential for electronic applications.
• Inducing stable magnetism in 2D materials at room temperature is a significant challenge.
• Spintronics offers potential for low-power, high-speed electronic devices.

Purpose of the Study:

• To effectively induce weak ferromagnetism in pristine MoS2.
• To achieve ferromagnetism that persists up to room temperature.
• To enhance the transport properties of MoS2 for spintronics applications.

Main Methods:

• Hydrogenation of MoS2 by heating at 300 °C for 1 hour.
• Proton irradiation of MoS2 with a dose of 1 × 10^13 P/cm^2.
• Theoretical modeling to support experimental findings.

Main Results:

• Hydrogenation resulted in an out-of-plane magnetic easy axis.
• Proton irradiation led to an in-plane magnetic easy axis.
• Both methods yielded ferromagnetism in MoS2 persisting up to room temperature with improved transport properties.

Conclusions:

• Effective methods for inducing room-temperature ferromagnetism in MoS2 have been demonstrated.
• Tailoring the magnetic easy axis (in-plane vs. out-of-plane) is achievable through different treatments.
• The findings open new avenues for developing advanced spintronics devices based on 2D materials.