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It's always special to collaborate with my previous institute Helmholtz-Zentrum Berlin! In this very interesting work Catherine Dubourdieu and Rong Wu report electrochemical metallization in polycrystalline YMnO3-based devices using Al as an active electrode. In the we represented the filament formation, which happens at the grain boundaries between two different phases of YMnO3, following the migration of Al3+ cations from the electrode.

✏ full paper at onlinelibrary.wiley.com/toc/26

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