Nanoparticle-Induced Anomalous Hall Effect in Graphene.

Area of Science:

• Condensed Matter Physics
• Materials Science
• Nanotechnology

Background:

• Introducing magnetic properties into graphene is crucial for spintronics.
• Proximity-induced ferromagnetism (PIFM) in graphene has been achieved using ferromagnetic insulators (FMIs).
• Existing FMIs have limitations in growth, deposition, Curie temperature, and interface quality.

Purpose of the Study:

• To explore alternative methods for inducing magnetic properties in graphene.
• To investigate the feasibility of using discontinuous magnetic structures for graphene spintronics.
• To overcome the limitations associated with traditional FMI/graphene interfaces.

Main Methods:

• Graphene was proximity coupled to an array of magnetic nanoparticles.
• The anomalous Hall effect (AHE) in graphene was measured.
• Characterization of the graphene-nanoparticle interface was performed.

Main Results:

• The anomalous Hall effect (AHE) was successfully observed in graphene coupled to magnetic nanoparticles.
• This demonstrates induced magnetic properties in graphene via a discontinuous magnetic structure.
• The method avoids issues associated with FMI growth and transfer.

Conclusions:

• Graphene can exhibit proximity-induced magnetism through coupling with magnetic nanoparticles.
• This approach significantly broadens the range of materials usable for graphene spintronics.
• It enables new possibilities for creating patterned spintronic devices and circuitry.