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@ARTICLE{Tsuruoka:279247,
author = {Tsuruoka, Tohru and Valov, Ilia and Tappertzhofen, Stefan
and van den Hurk, Jan and Hasegawa, Tsuyoshi and Waser, R.
and Aono, Masakazu},
title = {{R}edox {R}eactions at {C}u,{A}g/{T}a $_{2}$ {O} $_{5}$
{I}nterfaces and the {E}ffects of {T}a $_{2}$ {O} $_{5}$
{F}ilm {D}ensity on the {F}orming {P}rocess in {A}tomic
{S}witch {S}tructures},
journal = {Advanced functional materials},
volume = {25},
number = {40},
issn = {1616-301X},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2015-07262},
pages = {6374 - 6381},
year = {2015},
abstract = {Cu and Ag redox reactions at the interfaces with Ta2O5 and
the impact of Ta2O5 film density on the forming process of
Cu,Ag/Ta2O5/Pt atomic switch structures are investigated.
Cyclic voltammetry measurements revealed that under positive
bias to the Cu (Ag) electrode, Cu is preferentially oxidized
to Cu2+, while Ag is oxidized to Ag+ ions. Subsequent
negative bias causes a reduction of oxidized Cu (Ag) ions at
the interfaces. The diffusion coefficient of the Cu and Ag
ions in the Ta2O5 film is estimated from the results from
different bias voltage sweep rates. It is also found that
the redox current is enhanced and the forming voltage of the
Cu/Ta2O5/Pt cell is reduced when the density of the Ta2O5
film is decreased. This result indicates the importance of
the structural properties of the matrix oxide film in
understanding and controlling resistive switching behavior},
cin = {PGI-7},
ddc = {620},
cid = {I:(DE-Juel1)PGI-7-20110106},
pnm = {521 - Controlling Electron Charge-Based Phenomena
(POF3-521)},
pid = {G:(DE-HGF)POF3-521},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000363685900008},
doi = {10.1002/adfm.201500853},
url = {https://juser.fz-juelich.de/record/279247},
}