Polarization control at spin-driven ferroelectric domain walls - Institut de chimie de la matière condensée de Bordeaux Accéder directement au contenu
Article Dans Une Revue Nature Communications Année : 2015

Polarization control at spin-driven ferroelectric domain walls

Résumé

Unusual electronic states arise at ferroelectric domain walls due to the local symmetry reduction, strain gradients and electrostatics. This particularly applies to improper ferroelectrics, where the polarization is induced by a structural or magnetic order parameter. Because of the subordinate nature of the polarization, the rigid mechanical and electrostatic boundary conditions that constrain domain walls in proper ferroics are lifted. Here we show that spin-driven ferroelectricity promotes the emergence of charged domain walls. This provides new degrees of flexibility for controlling domain-wall charges in a deterministic and reversible process. We create and position a domain wall by an electric field in Mn$_{0.95}$Co$_{0.05}$WO$_4$. With a magnetic field we then rotate the polarization and convert neutral into charged domain walls, while its magnetic properties peg the wall to its location. Using atomistic Landau-Lifshitz-Gilbert simulations we quantify the polarization changes across the two wall types and highlight their general occurrence.
Fichier principal
Vignette du fichier
2015-062.pdf (3.2 Mo) Télécharger le fichier
Origine Publication financée par une institution

Dates et versions

hal-01144962 , version 1 (23-05-2024)

Identifiants

Citer

Naëmi Leo, Anders Bergman, Andres Cano, Narayan Poudel, Bernd Lorenz, et al.. Polarization control at spin-driven ferroelectric domain walls. Nature Communications, 2015, 6, pp.6661. ⟨10.1038/ncomms7661⟩. ⟨hal-01144962⟩
63 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More