Tuning competing magnetic interactions with pressure in RMn2O5 multiferroics - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 2019

Tuning competing magnetic interactions with pressure in RMn2O5 multiferroics

Résumé

Magnetoelectric properties displayed in multiferroics are generally associated with complex magnetic orders. This complexity often results in a delicate balance between several geometrically frustrated magnetic exchange interactions. Applying pressure will thus unbalance this equilibrium and strongly affect the multiferroic properties. In this paper, we study the effect of pressure on magnetism in three particular members of the RMn2O5 multiferroics (R = Gd, Sm, and Nd) with interesting magnetic orders. Using powder neutron diffraction, we studied the evolution of their magnetic structures as a function of pressure. Despite their singular properties with respect to the other compositions, we demonstrate that these three members present the same pressure-induced commensurate phase (PCM) with the propagation wave vector [qPCM = (1/2 , 0, 1/2 )]. Furthermore, the stabilization of the PCM phase under pressure can be explained by a similar mechanism. We ultimately conclude that the different origin of the CM and PCM phases of these three compounds are related to the competition of only two superexchange interactions, namely J1 and J6.
Fichier principal
Vignette du fichier
PhysRevB.99.245109.pdf (1.58 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03091216 , version 1 (24-08-2023)

Identifiants

Citer

W. Peng, V. Balédent, Claire Colin, T. Hansen, M. Greenblatt, et al.. Tuning competing magnetic interactions with pressure in RMn2O5 multiferroics. Physical Review B, 2019, 99 (24), pp.245109. ⟨10.1103/PhysRevB.99.245109⟩. ⟨hal-03091216⟩
56 Consultations
7 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More