Unveiling the Outstanding Oxygen Mass Transport Properties of Mn-Rich Perovskites in Grain Boundary-Dominated La_0.8Sr_0.2(Mn_1-x Co _x )_0.85O_3±δ Nanostructures.

ABSTRACT: Ion transport in solid-state devices is of great interest for current and future energy and information technologies. A superior enhancement of several orders of magnitude of the oxygen diffusivity has been recently reported for grain boundaries in lanthanum-strontium manganites. However, the significance and extent of this unique phenomenon are not yet established. Here, we fabricate a thin film continuous composition map of the La_0.8Sr_0.2(Mn_1-x Co _x )_0.85O_3±δ family revealing a substantial enhancement of the grain boundary oxygen mass transport properties for the entire range of compositions. Through isotope-exchange depth profiling coupled with secondary ion mass spectroscopy, we show that this excellent per

SUBMITTER: Saranya AM 

PROVIDER: S-EPMC6122949 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature