Antiferromagnetic textures in BiFeO 3 controlled by strain and electric field 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 : Ref HAL: hal-02909544_v1 DOI: 10.1038/s41467-020-15501-8 Exporter : BibTex | endNote Résumé: 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. |