Ambient Moisture-Induced Self Alignment of Polarization in Ferroelectric Hafnia.

ABSTRACT: The discovery of nanoscale ferroelectricity in hafnia (HfO₂) has paved the way for next generation high-density, non-volatile devices. Although the surface conditions of nanoscale HfO₂ present one of the fundamental mechanism origins, the impact of external environment on HfO₂ ferroelectricity remains unknown. In this study, the deleterious effect of ambient moisture is examined on the stability of ferroelectricity using Hf_0.5Zr_0.5O₂ (HZO) films as a model system. It is found that the development of an intrinsic electric field due to the adsorption of atmospheric water molecules onto the film's surface significantly impairs the properties of domain retention and polarization stability. Nonetheless, vacuum heating efficiently

SUBMITTER: Wei LQ 

PROVIDER: S-EPMC11672260 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature