Ferroelectric domain walls : statics, dynamics, and functionalities revealed by atomic force microscopy / Jill Guyonnet.
2014
QC761.5
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Title
Ferroelectric domain walls : statics, dynamics, and functionalities revealed by atomic force microscopy / Jill Guyonnet.
Author
Guyonnet, Jill, author.
ISBN
9783319057491
3319057499
9783319057507 electronic book
3319057502 electronic book
3319057499
9783319057507 electronic book
3319057502 electronic book
Published
Cham ; New York : Springer, 2014.
Language
English
Description
1 online resource
Call Number
QC761.5
Dewey Decimal Classification
538.44
Summary
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.
Dissertation Note
Ph.D. University of Geneva. [2014]
Bibliography, etc. Note
Includes bibliographical references.
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Access limited to authorized users.
Source of Description
Description based on print version record.
Series
Springer theses.
Available in Other Form
Ferroelectric Domain Walls
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