Experimental demonstration of tunable hybrid improper ferroelectricity in double-perovskite superlattice films.

ABSTRACT: Hybrid improper ferroelectricity can effectively avoid the intrinsic chemical incompatibility of electronic mechanism for multiferroics. Perovskite superlattices, as theoretically proposed hybrid improper ferroelectrics with simple structure and high technological compatibility, are conducive to device integration and miniaturization, but the experimental realization remains elusive. Here, we report a strain-driven oxygen octahedral distortion strategy for hybrid improper ferroelectricity in La₂NiMnO₆/La₂CoMnO₆ double-perovskite superlattices. The epitaxial growth mode with mixed crystalline orientations maintains a large strain transfer distance more than 90 nm in the superlattice films with lattice mismatch less than 1%. Such epitaxial strain p

SUBMITTER: Jiang Y 

PROVIDER: S-EPMC11219787 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature