Notice bibliographique
- Notice
Type(s) de contenu et mode(s) de consultation : Texte noté : électronique
Auteur(s) : Guyonnet, Jill
Titre(s) : Ferroelectric domain walls [Texte électronique] : statics, dynamics, and functionalities revealed by atomic force microscopy / Jill Guyonnet
Publication : Cham ; New York : Springer, 2014
Description matérielle : 1 online resource
Collection : Springer theses
Note(s) : Includes bibliographical references. - Print version record.
Ph. D. : University of Geneva. : 2014
Using the nanometric resolution of atomic force microscopy techniques, this work explores
the rich fundamental physics and novel functionalities of domain walls in ferroelectric
materials, the nanoscale interfaces separating regions of differently oriented spontaneous
polarization. Due to the local symmetry-breaking caused by the change in polarization,
domain walls are found to possess an unexpected lateral piezoelectric response, even
when this is symmetry-forbidden in the parent material. This has interesting potential
applications in electromechanical devices based on ferroelectric domain patterning.
Moreover, electrical conduction is shown to arise at domain walls in otherwise insulating
lead zirconate titanate, the first such observation outside of multiferroic bismuth
ferrite, due to the tendency of the walls to localize defects. The role of defects
is then explored in the theoretical framework of disordered elastic interfaces possessing
a characteristic roughness scaling and complex dynamic response. It is shown that
the heterogeneous disorder landscape in ferroelectric thin films leads to a breakdown
of the usual self-affine roughness, possibly related to strong pinning at individual
defects. Finally, the roles of varying environmental conditions and defect densities
in domain switching are explored, and shown to be adequately modelled as a competition
between screening effects and pinning
Sujet(s) : Domaines magnétiques
Couches minces ferroélectriques
Microscopie à force atomique
Astronomie
Indice(s) Dewey :
538.44 (23e éd.) = Ferromagnétisme ; 530.417 (23e éd.) = Physique des surfaces
Identifiants, prix et caractéristiques : ISBN 9783319057507
Identifiant de la notice : ark:/12148/cb446759126
Notice n° :
FRBNF44675912
(notice reprise d'un réservoir extérieur)
Table des matières : Domain Walls in Ferroelectric Materials ; Experimental Setup ; Lateral Piezoelectric
Response Across Ferroelectric Domain Walls ; Electrical Conduction at 180° Ferroelectric
Domain Walls ; A Statistical Approach to Domain Wall Roughening and Dynamics: Disordered
Elastic Systems ; Measuring the Roughness Exponent of One-Dimensional Interfaces
; Roughness Analysis of 180° Ferroelectric Domain Walls ; Disorder and Environmental
Effects on Nanodomain Growth.