- Antiferromagnetic textures in BiFeO 3 controlled by strain and electric field doi link

Auteur(s): Haykal A., Fischer J., Akhtar W., Chauleau J.-Y., Sando D., Finco A., GODEL F., Birkhölzer Y., Carrétéro C., Jaouen N., Bibes M., Viret M., Fusil S., Jacques V., Garcia Vincent

(Article) Publié: Nature Communications, vol. 11 p. (2020)
Texte intégral en Openaccess : openaccess

Ref HAL: hal-02909544_v1
DOI: 10.1038/s41467-020-15501-8
Exporter : BibTex | endNote

Antiferromagnetic thin films are currently generating considerable excitement for low dis-sipation magnonics and spintronics. However, while tuneable antiferromagnetic textures form the backbone of functional devices, they are virtually unknown at the submicron scale. Here we image a wide variety of antiferromagnetic spin textures in multiferroic BiFeO 3 thin films that can be tuned by strain and manipulated by electric fields through room-temperature magnetoelectric coupling. Using piezoresponse force microscopy and scanning NV magne-tometry in self-organized ferroelectric patterns of BiFeO 3 , we reveal how strain stabilizes different types of non-collinear antiferromagnetic states (bulk-like and exotic spin cycloids) as well as collinear antiferromagnetic textures. Beyond these local-scale observations, resonant elastic X-ray scattering confirms the existence of both types of spin cycloids. Finally, we show that electric-field control of the ferroelectric landscape induces transitions either between collinear and non-collinear states or between different cycloids, offering perspectives for the design of reconfigurable antiferromagnetic spin textures on demand.