Oscillatory Curie temperature of two-dimensional ferromagnets

Abstract

The effective exchange interactions of magnetic overlayers Fe/Cu(001) and Co/Cu(001) covered by a Cu-cap layer of varying thickness were calculated in real space from first principles. The effective two-dimensional Heisenberg Hamiltonian was constructed and used to estimate magnon dispersion laws, spin-wave stiffness constants, and overlayer Curie temperatures within the mean-field and random-phase approximations. Overlayer Curie temperature oscillates as a function of the cap-layer thickness in a qualitative agreement with a recent experiment.

RevTeX 3.1, 4 pages, 3 figures (PS files); v2: revised version; v3: reference added

Cited by in corpus (19)

• Ab-initio calculations of exchange interactions, spin-wave stiffness constants, and Curie temperatures of Fe, Co, and Ni
• Large magneto-optical effects and magnetic anisotropy energy in two-dimensional Cr${}_2$Ge${}_2$Te${}_6$
• Different dimensionality trends in the Landau damping of magnons in iron, cobalt and nickel: time dependent density functional study
• Magnetism and Magneto-optical Effects in Bulk and Few-layer CrI${}_3$: A Theoretical GGA + U Study
• Atomistic spin dynamics of low-dimensional magnets
• The onset of magnetic order in fcc-Fe films on Cu(100)
• {\it Ab initio} studies of spin-spiral waves and exchange interactions in 3{\it d} transition metal atomic chains
• Substrate-induced antiferromagnetism of an Fe monolayer on the Ir(001) surface
• Reversible control of Dzyaloshinskii-Moriya interaction at graphene/Co interface via hydrogen absorption
• Tunable electronic structure and magnetic anisotropy in bilayer ferromagnetic semiconductor Cr2Ge2Te6
• RPA-CPA theory for magnetism in disordered Heisenberg binary systems with long range exchange integrals
• Suppression of Standing Spin Waves in Low-Dimensional Ferromagnets
• Carrier mediated interlayer exchange, ground state phase diagrams and transition temperatures of magnetic thin films
• Exchange interactions from a nonorthogonal basis set: from bulk ferromagnets to the magnetism in low-dimensional graphene systems
• Relativistic magnetic interactions from non-orthogonal basis sets
• Ambient and high pressure studies of structural, electronic and magnetic properties of EuZn${}_2$P${}_2$ single crystal
• The first-principles study of thermodynamical properties of random magnetic overlayers on fcc-Cu(001) substrate
• Quantum and thermal fluctuations in a two-dimensional correlated band ferromagnet -- Goldstone-mode preserving investigation with self-energy and vertex corrections
• Topologically-driven three-spin chiral exchange interactions treated from first principles