Navigation on the energy surface of the noncollinear Alexander-Anderson model
Аннотация:
Implementation of the multiple impurity, noncollinear Alexander-Anderson model is described in detail and an analytical expression given for the force which determines the orientation of the magnetic momenta as well as a corresponding magnetic force theorem. Applications to trimers of Cr, Mn and Fe adsorbed on a metal surface are described, including the energy surface as a function of the the angles specifying the orientation of the magnetic momenta and minimum energy paths for transitions between stable states, which necessarily involve noncollinear ordering. A simple model for the interaction of a magnetic STM tip with a Cr dimer on a surface is briefly described. A finite range approximation is also formulated, which simplifies the self-consistency calculations and results in linear scaling of the computational effort with the number of magnetic atoms in the system. The theoretical approach described here can be used to study magnetic systems with complex energy landscapes, including stable states and magnetic transitions in frustrated magnetic systems, over a range in length scale, from a few to several thousands of magnetic atoms.
Ключевые слова:
Постоянный URL
Статьи в номере
- Effect of the elimination of the barrier layer period in productive process and its simulation of absorption spectra for anodic alumina membrane
- X-ray luminescence of BaF2:Ce3+ powders
- The effect of the cell phone radiation on a freely suspended liquid-crystal film
- Physical properties of hot wall deposited Sn1-xPbxS thin films
- Fabrication and Characterization ZnCdS nanowire
- Spectral regularities of the critical energy density of the pentaerythriol tetranitrate- aluminum nanosystems initiated by the laser pulse
- Measuring local quantum yield of photoluminescence and phototransformations with laser scanning microscope
- Hydrogen adsorption properties of metal-organic frameworks within the density-functional based tight-binding approach
- New route to poly (2, 6 – diimidaazo (4,5-b: 4’,5’ - e) pyridinelene-1,4 (2,5-dihydroxy)-phenylene) (pipd) and high modulus fiber on it basis
- Dielectric properties of Aurivillius phase Bi10Fe6Ti3O30 with a nano-sized pseudo-perovskite blocks
- Synthesis and studies room temperature conductivity, dielectric analysis of LaF3 nanocrystals
- Porous structure of carbon nanoparticles prepared by chlorination of nanoparticles of silicon carbid
- Nanocrystalline perovskite-like oxides formation in Ln2O3 – Fe2O3 – H2O (Ln = La, Gd) systems