Non-conventional mechanism of ferroelectric fatigue via cation migration.

ABSTRACT: The unique properties of ferroelectric materials enable a plethora of applications, which are hindered by the phenomenon known as ferroelectric fatigue that leads to the degradation of ferroelectric properties with polarization cycling. Multiple microscopic models explaining fatigue have been suggested; however, the chemical origins remain poorly understood. Here, we utilize multimodal chemical imaging that combines atomic force microscopy with time-of-flight secondary mass spectrometry to explore the chemical phenomena associated with fatigue in PbZr_0.2Ti_0.8O₃ (PZT) thin films. Investigations reveal that the degradation of ferroelectric properties is correlated with a local chemical change and migration of electrode ions into the PZT structure. Density fun

SUBMITTER: Ievlev AV 

PROVIDER: S-EPMC6624312 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature