Magnetic dynamics of NiPS3 - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 2022

Magnetic dynamics of NiPS3

Résumé

Neutron spectroscopy measurements have been performed on single crystals of the antiferromagnetic van der Waals compound NiPS3. Linear spin-wave theory using a Heisenberg Hamiltonian with single-ion anisotropies has been applied to determine the magnetic exchange parameters and the nature of the anisotropy. The analysis reveals that NiPS3 is less two-dimensional than its sister compounds, with a relatively large ferromagnetic exchange of J?=-0.3 meV between the layered ab planes. In-plane magnetic exchange interactions up to the third-nearest neighbor were required to fit the data. The nearest-neighbor exchange was ferromagnetic with J1=-2.6 meV, the second neighbor was antiferromagnetic and small with J2=0.2 meV, and the dominant antiferromagnetic third-neighbor exchange was J3=13.5 meV. The anisotropy was shown to be largely XY-like with a small uniaxial component, leading to the appearance of two low-energy spin wave modes in the spin-wave spectrum at the Brillouin zone center. The analysis could reproduce the spin-wave energies, however, there are discrepancies with the calculated neutron intensities, hinting at more exotic phenomena.
Fichier principal
Vignette du fichier
Wildes et al - 2022 - Magnetic dynamics of NiPS3.pdf (893.78 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03932099 , version 1 (17-01-2023)

Identifiants

Citer

A. R Wildes, J.R. Stewart, M.D. Le, R. a. Ewings, K. C. Rule, et al.. Magnetic dynamics of NiPS3. Physical Review B, 2022, 106 (17), pp.174422. ⟨10.1103/PhysRevB.106.174422⟩. ⟨hal-03932099⟩
17 Consultations
70 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More