Magnetic exchange interactions in the van der Waals layered antiferromagnet MnPSe3
| Autor: | D. G. Mandrus, Amanda Haglund, Alexander I. Kolesnikov, Stuart Calder |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Exchange interaction FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Inelastic neutron scattering Magnetic exchange Ion Condensed Matter - Strongly Correlated Electrons symbols.namesake Lattice (order) 0103 physical sciences symbols Antiferromagnetism Condensed Matter::Strongly Correlated Electrons van der Waals force 010306 general physics 0210 nano-technology Anisotropy |
| Zdroj: | Physical Review B. 103 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | Two-dimensional van der Waals compounds with magnetic ions on a honeycomb lattice are hosts to a variety of exotic behavior. The magnetic interactions in one such compound, $\mathrm{Mn}\mathrm{P}{\mathrm{Se}}_{3}$, are investigated with elastic and inelastic neutron scattering. Magnetic excitations are observed in the magnetically ordered regime and persist to temperatures well above the ordering temperature, ${T}_{\text{N}}=74\phantom{\rule{0.28em}{0ex}}\mathrm{K}$, consistent with low dimensional magnetic interactions. The inelastic neutron scattering results allow a model spin Hamiltonian to be presented that includes dominant intralayer interactions of ${J}_{1ab}=0.45$ meV, ${J}_{2ab}=0.03$ meV, ${J}_{3ab}=0.19$ meV, consistent with theoretical predictions. Despite the quasi-2D behavior, appreciable interlayer interactions of ${J}_{c}=0.031(5)$ meV are required to model the data. No evidence for anisotropy in the form of a spin gap is observed in the data collected. The measurements on $\mathrm{Mn}\mathrm{P}{\mathrm{Se}}_{3}$ are contrasted with those on $\mathrm{Mn}\mathrm{P}{\mathrm{S}}_{3}$ and reveal a large increase in the interlayer exchange interaction in $\mathrm{Mn}\mathrm{P}{\mathrm{Se}}_{3}$ that may stabilize the similar ordering temperatures in the bulk compounds. |
| Databáze: | OpenAIRE |
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