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@ARTICLE{Tileli:187198,
author = {Tileli, Vasiliki and Duchamp, Martial and Axelsson, Anna -
Karin and Valant, Matjaz and Dunin-Borkowski, Rafal and McN
Alford, Neil},
title = {{O}n stoichiometry and intermixing at the spinel/perovskite
interface in {C}o{F}e$_{2}${O}$_{4}$/{B}a{T}i{O}$_{3}$ thin
films},
journal = {Nanoscale},
volume = {7},
issn = {2040-3364},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2015-00872},
pages = {218-224},
year = {2015},
abstract = {The performance of complex oxide heterostructures depends
primarily on the interfacial coupling of the two component
structures. This interface character inherently varies with
the synthesis method and conditions used since even small
composition variations can alter the electronic,
ferroelectric, or magnetic functional properties of the
system. The focus of this article is placed on the interface
character of a pulsed laser deposited CoFe2O4/BaTiO3 thin
film. Using a range of state-of-the-art transmission
electron microscopy methodologies, the roles of substrate
morphology, interface stoichiometry, and cation intermixing
are determined on the atomic level. The results reveal a
surprisingly uneven BaTiO3 substrate surface formed after
the film deposition and Fe atom incorporation in the top few
monolayers inside the unit cell of the BaTiO3 crystal.
Towards the CoFe2O4 side, a disordered region extending
several nanometers from the interface was revealed and both
Ba and Ti from the substrate were found to diffuse into the
spinel layer. The analysis also shows that within this
somehow incompatible composite interface, a different phase
is formed corresponding to the compound Ba2Fe3Ti5O15, which
belongs to the ilmenite crystal structure of FeTiO3 type.
The results suggest a chemical activity between these two
oxides, which could lead to the synthesis of complex
engineered interfaces.},
cin = {PGI-5},
ddc = {600},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000346919200022},
doi = {10.1039/c4nr04339a},
url = {https://juser.fz-juelich.de/record/187198},
}