Room temperature ferroelectricity in fluoroperovskite thin films.

ABSTRACT: The NaMnF₃ fluoride-perovskite has been found, theoretically, to be ferroelectric under epitaxial strain becoming a promising alternative to conventional oxides for multiferroic applications. Nevertheless, this fluoroperovskite has not been experimentally verified to be ferroelectric so far. Here we report signatures of room temperature ferroelectricity observed in perovskite NaMnF₃ thin films grown on SrTiO₃. Using piezoresponse force microscopy, we studied the evolution of ferroelectric polarization in response to external and built-in electric fields. Density functional theory calculations were also performed to help understand the strong competition between ferroelectric and paraelectric phases as well as the profound influences of strain. These results

SUBMITTER: Yang M 

PROVIDER: S-EPMC5543180 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature