تقرير
Ferroelectric texture of individual barium titanate nanocrystals
| العنوان: | Ferroelectric texture of individual barium titanate nanocrystals |
|---|---|
| المؤلفون: | Muraleedharan, Athulya, Co, Kevin, Vallet, Maxime, Zaki, Abdelali, Karolak, Fabienne, Bogicevic, Christine, Perronet, Karen, Dkhil, Brahim, Paillard, Charles, Fiorini-Debuisschert, Céline, Treussart, François |
| المساهمون: | Laboratoire Lumière, Matière et Interfaces (LuMIn), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Ecole Normale Supérieure Paris-Saclay (ENS Paris Saclay), Laboratoire Structures, Propriétés et Modélisation des solides (SPMS), Institut de Chimie - CNRS Chimie (INC-CNRS)-CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique Paris-Saclay (LMPS), University of Arkansas Fayetteville, Service de physique de l'état condensé (SPEC - UMR3680), Institut Rayonnement Matière de Saclay (DRF) (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), GENCI-TGCC (grant AD010913519), CNRS MITI Matériaux 2020, ANR-21-CE09-0028,UFO,Nanocristaux ferroélectriques à conversion ascendante de photon pour la détection optique de potentiel électrique dans les systèmes biologiques(2021), ANR-21-CE09-0033,TATOO,Contrôle des états topologiques dans les multiferroïques(2021) |
| المصدر: | https://hal.science/hal-04464712Test ; 2024. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2024 |
| المجموعة: | HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
| مصطلحات موضوعية: | Ferroelectrics Barium titanate Nanocrystal Piezoresponse force microscopy Phase field simulation, Ferroelectrics, Barium titanate, Nanocrystal, Piezoresponse force microscopy, Phase field simulation, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] |
| الوصف: | Ferroelectric materials display exotic polarization textures at the nanoscale that could be used to improve the energetic efficiency of electronic components. The vast majority of studies were conducted in two dimensions on thin films, that can be further nanostructured, but very few studies address the situation of individual isolated nanocrystals synthesized in solution, while such structures could open other field of applications. In this work, we experimentally and theoretically studied the polarization texture of ferroelectric barium titanate (BaTiO3 , BTO) nanocrystals (NC) attached to a conductive substrate and surrounded by air. We synthesized NC of well defined 1 quasi-cubic shape and 160 nm average size, that conserve the tetragonal structure of BTO at room temperature. We then investigated the inverse piezoelectric properties of such pristine individual NC by vector piezoresponse force microscopy (PFM), taking particular care of suppressing electrostatic artifacts. In all the NC studied, we could not detect any vertical PFM signal, and the maps of the lateral response all displayed larger displacement amplitude on the edges with deformations converging toward the center. Using fieldphase simulations dedicated to ferroelectric nanostructures, we were able to predict the equilibrium polarization texture. These simulations revealed that the NC core is composed of 180° up and down domains defining the polar axis, that rotate by 90° in the two facets orthogonal to this axis, eventually lying within these planes forming a layer of about 10 nm thickness mainly composed of 180° domains along an edge. From this polarization distribution we predicted the lateral PFM response, that revealed to be in very good qualitative agreement with the experimental observations. This work positions PFM as a relevant tool to evaluate the potential of complex ferroelectric nanostructures to be used as sensors. |
| نوع الوثيقة: | report |
| اللغة: | English |
| العلاقة: | hal-04464712; https://hal.science/hal-04464712Test; https://hal.science/hal-04464712/documentTest; https://hal.science/hal-04464712/file/NanoBTO_ferroelectric_texture.pdfTest |
| الإتاحة: | https://hal.science/hal-04464712Test https://hal.science/hal-04464712/documentTest https://hal.science/hal-04464712/file/NanoBTO_ferroelectric_texture.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.AB80420B |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |