Preferential orientations of FeRh nanomagnets deposited on a BaTiO3 epitaxial thin film
Résumé
Size-selected FeRh clusters have been deposited at low energy and under ultra-high vacuum conditions, on a BaTiO3 epitaxial thin film. Using x-ray diffraction in grazing incidence configuration, we have observed the chemical ordering of FeRh nanoparticles into the chemically ordered B2 phase after annealing, while a reciprocal space mapping indicates that particles, despite their random deposition, are finally adopting preferential orientations reflecting an atomic ordering with the BaTiO3 crystal. In addition to the usual expitaxy relationsship observed for FeRh thin films, an unexpected orientation is detected (45°in-plane rotation, leading to a new cube-on-cube epitaxy relationship), which must be specific to nanosized FeRh particles.
Domaines
Physique [physics]Origine | Fichiers produits par l'(les) auteur(s) |
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