Article Dans Une Revue Physical Review Materials Année : 2025

Unusual planar anisotropy of the induced magnetism in KTb3F10

I. Kibalin
A. Ivanov
O. Fabelo
D. Hrabovsky

Résumé

The magnetic ground state of KTb3F10 was investigated using a combination of magnetization measurements and neutron scattering experiments, carried out on either a polycrystal or a single-crystal sample. Results show that T⁢b3 remains in a crystalline electric field singlet state down to 30 mK. A susceptibility tensor analysis performed on a comprehensive neutron single-crystal diffraction dataset shows that the induced magnetism observed when applying a magnetic field is highly anisotropic, magnetic moments being confined within local anisotropy planes. These features can be well captured by a detailed analysis of the T⁢b3+crystal field scheme, combining point charge modeling and inelastic neutron scattering measurements in zero and applied magnetic field. Moreover, the local singlet ground state is protected by a large 2.7 meV gap, which the weak magnetic interactions between Tb moments are too weak to overcome, thereby preventing the formation of a magnetic ground state. Within this approximation, an estimate of the magnetic exchanges was extracted from the magnetic field evolution of the ordered Tb moments, obtained from the analysis of the diffraction data. These results provide a first step toward the understanding of the unusual magneto-optical and low thermal conductivity properties of the singlet system KTb3F10.

Fichier principal
Vignette du fichier
PhysRevMaterials.9.056201.pdf (4.47 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-05223632 , version 1 (27-08-2025)

Licence

Identifiants

Citer

O. Demortier, S. Petit, B. Fauqué, E. Ressouche, I. Kibalin, et al.. Unusual planar anisotropy of the induced magnetism in KTb3F10. Physical Review Materials, 2025, 9 (5), pp.056201. ⟨10.1103/PhysRevMaterials.9.056201⟩. ⟨hal-05223632⟩
345 Consultations
238 Téléchargements

Altmetric

Partager

  • More