About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
In-Situ Resistivity for Precise Control of Phase Transitions in Functional Oxides |
| Author(s) |
Wenchi Liu, Antoine Devincenti, Jennifer Fowlie |
| On-Site Speaker (Planned) |
Wenchi Liu |
| Abstract Scope |
Controlled post-growth annealing is essential for stabilizing functional oxides, as oxygen stoichiometry strongly influences crystalline ordering and electronic properties. Uncontrolled annealing can cause unwanted phase evolution and degradation, motivating real-time measurements of properties during thermal treatment. We report an in-situ resistivity measurement and real-time plotting system integrated into a tube furnace, operating up to 400 °C under varied gas environments, including ozone. By monitoring resistivity during annealing, this approach identifies optimal processing conditions, reveals oxygen-driven phase transitions, and facilitates on-the-fly materials-by-design. Measurements on thin-film La3Ni2O7 demonstrate reproducible resistivity evolution during thermal cycling, guiding annealing toward the superconducting Ruddlesden–Popper phase. The effectiveness of SrTiO3 capping layers in mitigating oxygen-loss-induced degradation in perovskite SrFeO3 is investigated, highlighting their role in controlling soft-chemistry-driven phase evolution. Together, these results establish this in-situ resistivity platform as a sensitive tool for monitoring phase transitions, optimizing annealing conditions, and improving complex oxide thin-film stability and functionality. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Copper / Nickel / Cobalt, Phase Transformations |