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@ARTICLE{Rodenbcher:843999,
author = {Rodenbücher, Christian and Meuffels, Paul and Bihlmayer,
Gustav and Speier, Wolfgang and Du, Hongchu and Schwedt, A.
and Breuer, Uwe and Jia, Chun-Lin and Mayer, Joachim and
Waser, R. and Szot, K.},
title = {{E}lectrically controlled transformation of memristive
titanates into mesoporous titanium oxides via incongruent
sublimation},
journal = {Scientific reports},
volume = {8},
number = {1},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2018-01515},
pages = {3774},
year = {2018},
abstract = {Perovskites such as SrTiO3, BaTiO3, and CaTiO3 have become
key materials for future energy-efficient memristive data
storage and logic applications due to their ability to
switch their resistance reversibly upon application of an
external voltage. This resistance switching effect is based
on the evolution of nanoscale conducting filaments with
different stoichiometry and structure than the original
oxide. In order to design and optimize memristive devices, a
fundamental understanding of the interaction between
electrochemical stress, stoichiometry changes and phase
transformations is needed. Here, we follow the approach of
investigating these effects in a macroscopic model system.
We show that by applying a DC voltage under reducing
conditions on a perovskite slab it is possible to induce
stoichiometry polarization allowing for a controlled
decomposition related to incongruent sublimation of the
alkaline earth metal starting in the surface region. This
way, self-formed mesoporous layers can be generated which
are fully depleted by Sr (or Ba, Ca) but consist of titanium
oxides including TiO and Ti3O with tens of micrometre
thickness. This illustrates that phase transformations can
be induced easily by electrochemical driving forces.},
cin = {PGI-7 / PGI-1 / ER-C-1 / ER-C-2 / ZEA-3 / JARA-FIT},
ddc = {000},
cid = {I:(DE-Juel1)PGI-7-20110106 / I:(DE-Juel1)PGI-1-20110106 /
I:(DE-Juel1)ER-C-1-20170209 / I:(DE-Juel1)ER-C-2-20170209 /
I:(DE-Juel1)ZEA-3-20090406 / $I:(DE-82)080009_20140620$},
pnm = {523 - Controlling Configuration-Based Phenomena (POF3-523)},
pid = {G:(DE-HGF)POF3-523},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29491379},
UT = {WOS:000426262400027},
doi = {10.1038/s41598-018-22238-4},
url = {https://juser.fz-juelich.de/record/843999},
}