145 citations · 343 across the 16 of their papers we have counts for
16 papers
History-dependent and frequency-dependent dielectric nonlinearities induced by polar nanoregions in a thin film of 0.5 ( Ba 0.7 Ca 0.3 TiO 3 ) -- 0.5 ( BaZr 0.2 Ti 0.8 O 3 )
Kevin Nadaud, Guillaume Nataf, Nazir Jaber +3
In this article, dielectric nonlinearities in 0.5(Ba0.7 Ca0.3 TiO3 ) -- 0.5(BaZr 0.2 Ti0.8 O3 ) thin film are studied using impedance spectroscopy and harmonic measurements, as a f…
Domain-wall driven suppression of thermal conductivity in a ferroelectric polycrystal
Rachid Belrhiti-Nejjar, Manuel Zahn, Patrice Limelette +8
A common strategy for reducing thermal conductivity of polycrystalline systems is to increase the number of grain boundaries. Indeed, grain boundaries enhance the probability of ph…
Tunable electrocaloric effect in lead scandium tantalate through calcium doping
Youri Nouchokgwe, Natalya S. Fedorova, Pranab Biswas +11
State-of-the-art electrocaloric cooling prototypes rely on the conventional electrocaloric effect of ferroelectric lead scandium tantalate (PbSc0.5Ta0.5O3, PST), which peaks near r…
Lead-free room-temperature ferroelectric thermal conductivity switch using anisotropies in thermal conductivities
Lucile Féger, Carlos Escorihuela-Sayalero, Jean-Michel Rampnoux +11
Materials with on-demand control of thermal conductivity are the prerequisites to build thermal conductivity switches, where the thermal conductivity can be turned ON and OFF. Howe…
Enhancement of piezoelectric properties in a narrow cerium doping range of evidenced by high throughput experiment
Kevin Nadaud, Guillaume F. Nataf, Nazir Jaber +5
Lead-free materials based on the (BCZT) system exhibit excellent electromechanical properties that can be strongly modified by small amounts of dopants…
Using oxides to compute with heat
Guillaume F. Nataf, Sebastian Volz, Jose Ordonez-Miranda +3
One of the most innovative possibilities offered by oxides is the use of heat currents for computational purposes. Towards this goal, phase-change oxides, including ferroelectrics,…
Subcoercive-field dielectric response of thin film: peculiar third harmonic signature of phase transitions and residual ferroelectricity
Kevin Nadaud, Guillaume F. Nataf, Nazir Jaber +5
Sub-coercive field non-linearities in (BCTZ 50/50) thin film elaborated using…
Influence of cation vacancy concentrations on ultra-low thermal conductivity in BiVO-BiMoO scheelite solid solutions
Guillaume F. Nataf, Hicham Ait Laasri, Damien Brault +5
Bismuth vanadate - bismuth molybdate solid-solution was prepared to elaborate ceramics with different amounts of cation vacancies. Dense ceramics with similar microstructures were…
Ultra-low lattice thermal conductivity in tungsten-based scheelite ceramics
Hicham Ait Laasri, Eliane Bsaibess, Fabian Delorme +2
, and polycrystalline ceramics were synthesized by conventional solid-state reaction route. The effect of cati…
Suppression of acoustic emission during superelastic tensile cycling of polycrystalline NiTi
Guillaume F. Nataf, Michela Romanini, Eduard Vives +4
We investigate acoustic emission (AE) that arises during the martensitic transition in a polycrystalline specimen of the prototypical superelastic/elastocaloric alloy NiTi…
High-contrast imaging of 180° ferroelectric domains by optical microscopy using ferroelectric liquid crystals
Guillaume. F. Nataf, Mael Guennou, Giusy Scalia +3
Ferroelectric liquid crystals (FLCs) couple the direction of their spontaneous electric polarization to the direction of tilt of their optic axis. Consequently, reversal of the ele…
Raman signatures of ferroic domain walls captured by principal component analysis
Guillaume F. Nataf, Nick Barrett, Jens Kreisel +1
Ferroic domain walls are currently investigated by several state-of-the art techniques in order to get a better understanding of their distinct, functional properties. Here, Princi…
Experimental evidence of accelerated seismic release without critical failure in acoustic emissions of compressed nanoporous materials
Jordi Baró, Karin A. Dahmen, Jörn Davidsen +5
The total energy of acoustic emission (AE) events in externally stressed materials diverges when approaching macroscopic failure. Numerical and conceptual models explain this accel…
Control of surface potential at polar domain walls in a nonpolar oxide
G. F. Nataf, M. Guennou, J. Kreisel +8
Ferroic domain walls could play an important role in microelectronics, given their nanometric size and often distinct functional properties. Until now, devices and device concepts…
Magnetic properties of the honeycomb oxide NaCoTeO
E. Lefrançois, M. Songvilay, J. Robert +8
We have studied the magnetic properties of NaCoTeO, which features a honeycomb lattice of magnetic Co ions, through macroscopic characterization and neutron diff…
Predicting Failure: Acoustic Emission of Berlinite under Compression
Guillaume F Nataf, Pedro O Castillo-Villa, Pathikumar Sellappan +4
Acoustic emission has been measured and statistical characteristics have been analyzed during the stress-induced collapse of porous berlinite, AlPO4, containing up to 50 vol% poros…