Effects of Interatomic Coupling on Magnetic Anisotropy and Order of Spins on Metallic Surfaces
arXiv:1502.03743 · doi:10.1021/acs.jpcc.5b10211
Abstract
Both quantum and classical behavior of single atomic spins on surfaces is determined by the local anisotropy of adatoms and their coupling to the immediate electronic environment. Yet adatoms seldom reside on surfaces alone and it is generally acknowledged that substrated-mediated interactions can couple single spins among each other impacting their magnetic behavior. Here we show that also magnetic anisotropy, which is usually considered to be a constant determined by the local crystal field, can be extremely sensitive to such interactions. By the example of Co dimers on Cu(001) and Pt(001) surfaces we highlight the intricate interplay of exchange coupling and magnetic anisotropy providing a much sought possibility to tune the latter through deliberate adjustment of the adatoms' separation. As a technologically relevant implication we demonstrate the impact of such emergent non-local anisotropy on the hysterectic properties of single-atom magnetization curves.
Accepted
References in corpus (7)
- Exchange interaction between single magnetic adatoms
- Magnetic Anisotropy and Magnetization Dynamics of Individual Atoms and Clusters of Fe and Co on Pt(111)
- Quantum Engineering of Spin and Anisotropy in Magnetic Molecular Junctions
- Interplay between Kondo effect and Ruderman-Kittel-Kasuya-Yosida interaction
- Splitting of the Kondo resonance in anisotropic magnetic impurities on surfaces
- Tailoring exchange interactions in engineered nanostructures: Ab initio study
- Derivation of the spin Hamiltonians for Fe in MgO