Weak ferromagnetism of antiferromagnetic domains in graphene with defects

Abstract

Magnetic properties of graphene with randomly distributed magnetic defects/vacancies are studied in terms of the Kondo Hamiltonian in the mean field approximation. It has been shown that graphene with defects undergoes a magnetic phase transition from a paramagnetic to a antiferromagnetic (AFM) phase once the temperature reaches the critical point $T_N$. The defect straggling is taken into account as an assignable cause of multiple nucleation into AFM domains. Since each domain is characterized by partial compensating magnetization of the defects associated with different sublattices, together they reveal a super-paramagnetic behavior in a magnetic field. Theory qualitatively describe the experimental data provided the temperature dependence of the AFM domain structure.

8 pages, 2 figures

References in corpus (20)

• The electronic properties of graphene
• Magnetism in Graphene Induced by Single-Atom Defects
• Emergence of magnetism in graphene materials and nanostructures
• Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
• Induced Magnetic Ordering by Proton Irradiation in Graphite
• Magnetic Correlations at Graphene Edges
• Room-temperature ferromagnetism in graphite driven by 2D networks of point defects
• Tunneling Spin Injection into Single Layer Graphene (Supplementary Information)
• Tunneling Spin Injection into Single Layer Graphene
• Vacancy induced magnetism in graphene and graphene ribbons
• Magnetism in Disordered Graphene and Irradiated Graphite
• Limits on intrinsic magnetism in graphene
• Diluted Graphene Antiferromagnet
• Orthogonality catastrophe and Kondo effect in graphene
• Kondo Quantum Criticality of Magnetic Adatoms in Graphene
• A Defective Graphene Phase Predicted to be a Room Temperature Ferromagnetic Semiconductor
• Magnetic moments in the presence of topological defects in graphene
• Nonmagnetic-Defect-Induced Magnetism in Graphene
• Ferromagnetism in armchair graphene nanoribbon
• Spin-Polarized Semiconductor Induced by Magnetic Impurities in Graphene

Cited by in corpus (2)

• Ferromagnetism in graphene nanoribbons: split versus oxidative unzipped ribbons
• Ferromagnetism in nitrogen doped graphene