期刊
ADVANCED MATERIALS
卷 31, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201805360
关键词
grain boundaries; interface-dominated materials; local nonstoichiometry; manganites; nanoionics
类别
资金
- Generalitat de Catalunya-AGAUR [2017 SGR 1421]
- European Regional Development Funds [MAT2016-79455-P/FEDER]
- European research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (ULTRASOFC) [681146]
- European Research Council (ERC) [681146] Funding Source: European Research Council (ERC)
Interface-dominated materials such as nanocrystalline thin films have emerged as an enthralling class of materials able to engineer functional properties of transition metal oxides widely used in energy and information technologies. In particular, it has been proven that strain-induced defects in grain boundaries of manganites deeply impact their functional properties by boosting their oxygen mass transport while abating their electronic and magnetic order. In this work, the origin of these dramatic changes is correlated for the first time with strong modifications of the anionic and cationic composition in the vicinity of strained grain boundary regions. We are also able to alter the grain boundary composition by tuning the overall cationic content in the films, which represents a new and powerful tool, beyond the classical space charge layer effect, for engineering electronic and mass transport properties of metal oxide thin films useful for a collection of relevant solid-state devices.
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