Hydrogen-Induced Topotactic Phase Transformations of Cobaltite Thin Films.

ABSTRACT: Manipulating physical properties through ion migration in complex oxide thin films is an emerging research direction to achieve tunable materials for advanced applications. While the reduction of complex oxides has been widely reported, few reports exist on the modulation of physical properties through a direct hydrogenation process. Here, we report an unusual mechanism for hydrogen-induced topotactic phase transitions in perovskite La_0.7Sr_0.3CoO₃ thin films. Hydrogenation is performed upon annealing in a pure hydrogen gas environment, offering a direct understanding of the role that hydrogen plays at the atomic scale in these transitions. Topotactic phase transformations from the perovskite (P) to hydrogenated-brownmillerite (H-BM) phase can be induced at

SUBMITTER: Feng M 

PROVIDER: S-EPMC11472462 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature