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@ARTICLE{Rupp:885493,
author = {Rupp, Jonathan A. J. and Corraze, Benoît and Besland,
Marie-Paule and Cario, Laurent and Tranchant, Julien and
Wouters, Dirk J. and Waser, R. and Janod, Etienne},
title = {{C}ontrol of stoichiometry and morphology in
polycrystalline {V}2{O}3 thin films using oxygen buffers},
journal = {Journal of materials science},
volume = {55},
number = {30},
issn = {1573-4803},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {FZJ-2020-03874},
pages = {14717 - 14727},
year = {2020},
abstract = {In this work, we investigate the influence of low
temperature reduction conditions (873 K) by different oxygen
buffers on the off-stoichiometry of polycrystalline V2O3
thin films. Vanadium oxide thin films (thickness 300 nm and
100 nm) have been grown by reactive sputtering and have been
annealed in a buffered atmosphere subsequently. Buffer
couples were chosen throughout the stability range of
V2−yO3 (y ≤ 0.03) by the use of different oxygen
buffer combinations, namely Ni/NiO, Fe/Fe3O4, Cr/Cr2O3 and
Mn/MnO. Thin films have been characterized by scanning
electron microscopy, X-ray diffractometry and low
temperature electrical transport measurements. Upon
decreasing the oxygen partial pressure, the mean grain size
of V2O3 decreases systematically from 45 ± 20 nm with a
high porosity to 27 ± 10 nm without porosity. The most
favourable reduction conditions have been identified for Fe-
and Cr-based couples. Moreover, all thin films reduced by
the four buffer couples exhibit high insulator-to-metal
transition temperatures (110–155 K) close to the value of
ideally stoichiometric V2−yO3 (y < 0.005) (155 K) as
well as large changes in resistance at the transition (three
to five orders of magnitude). This oxygen buffer method
hence provides a valuable synthesis method of highly
stoichiometric polycrystalline V2O3 thin films with
technological relevance},
cin = {PGI-7 / JARA-FIT},
ddc = {670},
cid = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$},
pnm = {524 - Controlling Collective States (POF3-524)},
pid = {G:(DE-HGF)POF3-524},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000549673700005},
doi = {10.1007/s10853-020-05028-0},
url = {https://juser.fz-juelich.de/record/885493},
}