Dislocation-tuned ferroelectricity and ferromagnetism of the BiFeO₃/SrRuO₃ interface.

ABSTRACT: Misfit dislocations at a heteroepitaxial interface produce huge strain and, thus, have a significant impact on the properties of the interface. Here, we use scanning transmission electron microscopy to demonstrate a quantitative unit-cell-by-unit-cell mapping of the lattice parameters and octahedral rotations around misfit dislocations at the BiFeO₃/SrRuO₃ interface. We find that huge strain field is achieved near dislocations, i.e., above 5% within the first three unit cells of the core, which is typically larger than that achieved from the regular epitaxy thin-film approach, thus significantly altering the magnitude and direction of the local ferroelectric dipole in BiFeO₃ and magnetic moments in SrRuO₃ near the interface. The strain field and,

SUBMITTER: Li X 

PROVIDER: S-EPMC10068816 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature