Hf Deposition Stabilizes the Surface Chemistry of Perovskite Manganite Oxide
Roland Bliem, Dongha Kim, Jiayue Wang, Ethan J. Crumlin, Bilge Yildiz
Abstract
cations to surface oxygen vacancies. Doping the surface layer with Hf, that has a higher affinity to oxygen, reduces this attraction by decreasing the surface oxygen vacancy concentration. In doing so, the use of physical vapor deposition highlights the direct role of the metal species in this system and excludes artifacts that could be introduced via chemical routes. The present work demonstrates this stabilizing effect of Hf on the surface of LSM, broadening the relevance of our prior findings on surface metal doping of other perovskite oxides.
Topics & Concepts
X-ray photoelectron spectroscopyOxidePerovskite (structure)Materials scienceOxygenEvaporationCathodeChemical engineeringAnalytical Chemistry (journal)ChemistryPhysical chemistryMetallurgyThermodynamicsChromatographyPhysicsEngineeringOrganic chemistryElectronic and Structural Properties of OxidesMagnetic and transport properties of perovskites and related materialsAdvancements in Solid Oxide Fuel Cells