6533b7dafe1ef96bd126ee49
RESEARCH PRODUCT
B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo
Jairo SinovaJairo SinovaSergei A. EgorovSergei A. EgorovMarie BöttcherMarie BöttcherBertrand DupéBertrand DupéStefan Heinzesubject
frustration of magnetic exchangemagnetic skyrmionsMonte Carlo methodthermodynamic studyFOS: Physical sciencesGeneral Physics and Astronomy02 engineering and technology53001 natural sciences7. Clean energyMonte Carlo simulationsPhase (matter)0103 physical sciencesSpin model010306 general physicsTopological quantum numberPhase diagramPhysicsCondensed Matter - Materials ScienceCondensed matter physicsSkyrmionMaterials Science (cond-mat.mtrl-sci)021001 nanoscience & nanotechnologyCondensed Matter::Strongly Correlated ElectronsDensity functional theoryParallel tempering0210 nano-technologydescription
We use an atomistic spin model derived from density functional theory calculations for the ultra-thin film Pd/Fe/Ir(111) to show that temperature induces coexisting non-zero skyrmion and antiskyrmion densities. We apply the parallel tempering Monte Carlo method in order to reliably compute thermodynamical quantities and the B-T phase diagram in the presence of frustrated exchange interactions. We evaluate the critical temperatures using the topological susceptibility. We show that the critical temperatures depend on the magnetic field in contrast to previous work. In total, we identify five phases: spin spiral, skyrmion lattice, ferromagnetic phase, intermediate region with finite topological charge and paramagnetic phase. To explore the effect of frustrated exchange interactions, we calculate the B-T phase diagram, when only effective exchange parameters are taken into account.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-07-06 | New Journal of Physics |