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@ARTICLE{Carlier:893850,
author = {Carlier, Thomas and Chambrier, Marie-Hélène and Da Costa,
Antonio and Blanchard, Florent and Denneulin, Thibaud and
Létiche, Manon and Roussel, Pascal and Desfeux, Rachel and
Ferri, Anthony},
title = {{F}erroelectric {S}tate in an α-{N}d 2 {WO} 6 {P}olymorph
{S}tabilized in a {T}hin {F}ilm},
journal = {Chemistry of materials},
volume = {32},
number = {17},
issn = {1520-5002},
address = {Washington, DC},
publisher = {American Chemical Society},
reportid = {FZJ-2021-02874},
pages = {7188 - 7200},
year = {2020},
abstract = {Taking advantage of strain engineering, Nd2WO6 (NdWO) thin
films have been successfully grown on (001)-oriented SrTiO3
single-crystal substrates by pulsed-laser deposition.
High-resolution X-ray diffraction characterizations
highlight the stabilization of a new orthorhombic (Pm21n)
NdWO polymorphic form, isostructural to α-La2WO6.
Reciprocal space mappings have been used in the
determination of the NdWO thin-film structure. Coupled with
the 2θ-ω X-ray patterns, the cell parameters were
calculated: a = 16.34(5) Å, b = 5.46(5) Å, and c = 8.68(1)
Å. X-ray-diffraction pole-figure measurements show the
crystallographic relationships between the film and
substrate: [100]NdWO∥[110]STO, [010]NdWO∥[11̅0]STO, and
[001]NdWO∥[001]STO. Both X-ray diffraction and
transmission electron microscopy studies reveal the
existence of (510)-oriented crystallites with respect to the
plane of the substrate mainly at the interface
film/substrate and dispersed in the (001)-NdWO matrix. In
addition, robust piezoelectricity and ferroelectricity are
revealed at room temperature through both local hysteresis
loops and domain manipulation experiments using the
piezoresponse force microscopy technique. Typical
polarization retention behaviors associated with specific
nanoscale conduction are in good agreement with the
classical ferroelectric phenomenon in oxide materials. The
successful observation of piezo-/ferroelectricity at room
temperature in innovative strain-stabilized α-NdWO thin
films paves the way for new lead-free functional materials
devoted to numerous applications, including actuators,
sensors, or nonvolatile memory devices.},
cin = {ER-C-1},
ddc = {540},
cid = {I:(DE-Juel1)ER-C-1-20170209},
pnm = {5351 - Platform for Correlative, In Situ and Operando
Characterization (POF4-535)},
pid = {G:(DE-HGF)POF4-5351},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000569075300009},
doi = {10.1021/acs.chemmater.0c01405},
url = {https://juser.fz-juelich.de/record/893850},
}