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Meeting Materials Science & Technology 2020
Symposium Grain Boundaries, Interfaces, and Surfaces in Functional Materials: Fundamental Structure-Property-Performance Relationships
Presentation Title Phase Stability of Sr<sub>1-x</sub>Ba<sub>x</sub>MnO<sub>3</sub> (0 ≤ x ≤ 0.5) Films Using Combinatorial Substrate Epitaxy
Author(s) Catherine Zhou, Paul Salvador, Gregory Rohrer, Marc De Graef
On-Site Speaker (Planned) Catherine Zhou
Abstract Scope Combinatorial substrate epitaxy is a high throughput film-growth method used herein to study the orientation relationships (ORs) and polytypic stability for (Sr,Ba)MnO<sub>3</sub> films grown on polycrystalline (Sr,Ba)TiO<sub>3</sub> substrates. (Sr,Ba)MnO<sub>3</sub> forms in either four-layered hexagonal (4H) or metastable three-layered cubic (3C) perovskite polytypes, depending on composition, deposition conditions, and substrate orientation. The range of substrate orientations stabilizing the 3C polytypes expands from (001) to (111) as temperature is increased or oxygen activity is decreased. 3C-SrMnO<sub>3</sub> polycrystalline films were stabilized over all of orientation space, while 3C-Ba<sub>0.5</sub>Sr<sub>0.5</sub>MnO<sub>3</sub> films grew on near-(001) substrate grains. Electron backscatter diffraction data was analyzed using dictionary indexing to determine the following ORs, which hold true regardless of the substrate surface orientation: (001)[100]<sub>4H film</sub>||(111)[1-10]<sub>3C substrate</sub> and (111)[1-10]<sub>3C film</sub>||(111)[1-10]<sub>3C substrate</sub>. These ORs align the eutactic planes and directions; its ubiquity indicates the interface energy is generally lower for the eutactic OR than for all other possible ORs.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Survey of Constrained Grain Boundary Migration Mechanisms
Advanced TEM of Interfaces and Defects in Functional Ceramics
Anisotropy at Interfaces in Rare-earth Pyrosilicates for High-temperature Coatings
Effect of Electrode Composition and Potential on Moisture Incorporation and Degradation in Dielectrics and Piezoelectrics
Electromigration-induced Defects' Evolution in Polycrystalline Interconnects: Insights from Phase-field Simulations
Equilibrium and Kinetic Shapes of Grains in Polycrystals
Grain Boundary Engineering ZnAl2O4 via Rare Earth (RE) Doping with Varying Ionic Radii
Implications of Ferroelectricity in Perovskite Solar Cells
Phase Stability of Sr1-xBaxMnO3 (0 ≤ x ≤ 0.5) Films Using Combinatorial Substrate Epitaxy
Relating Grain Size Distributions and Grain Boundary Excess Coverages to Complexion Transitions in Eu-doped MgAl2O4
The Impact of Metastable Grain Boundary States on Mobility in FCC Metal
Thermal Property of Diamond Thin Film on Si (100) Substrate
Vacancy-enhanced Grain Boundary Migration

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