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Insights into Nanoscale Electrochemical Reduction in a Memristive Oxide: the Role of Three‐Phase Boundaries
Author(s) -
Lenser Christian,
Patt Marten,
Menzel Stephan,
Köhl Annemarie,
Wiemann Carsten,
Schneider Claus M.,
Waser Rainer,
Dittmann Regina
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201304233
Subject(s) - materials science , nanoscopic scale , photoemission electron microscopy , oxide , electrode , joule heating , nanotechnology , electrochemistry , reduction (mathematics) , phase (matter) , triple phase boundary , optoelectronics , electron microscope , composite material , metallurgy , optics , chemistry , physics , geometry , cubic zirconia , ceramic , mathematics , organic chemistry , yttria stabilized zirconia
The nanoscale electro‐reduction in a memristive oxide is a highly relevant field for future non‐volatile memory materials. Photoemission electron microscopy is used to identify the conducting filaments and correlate them to structural features of the top electrode that indicate a critical role of the three phase boundary (electrode‐oxide‐ambient) for the electro‐chemical reduction. Based on simulated temperature profiles, the essential role of Joule heating through localized currents for electro‐reduction and morphology changes is demonstrated.