Guided anisotropic oxygen transport in vacancy ordered oxides.

ABSTRACT: Anisotropic and efficient transport of ions under external stimuli governs the operation and failure mechanisms of energy-conversion systems and microelectronics devices. However, fundamental understanding of ion hopping processes is impeded by the lack of atomically precise materials and probes that allow for the monitoring and control at the appropriate time- and length- scales. In this work, using in-situ transmission electron microscopy, we directly show that oxygen ion migration in vacancy ordered, semiconducting SrFeO_2.5 epitaxial thin films can be guided to proceed through two distinctly different diffusion pathways, each resulting in different polymorphs of SrFeO_2.75 with different ground electronic properties before reaching a fully oxidized, metallic SrFeO

SUBMITTER: Yang Z 

PROVIDER: S-EPMC10539514 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature