|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
20 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Stress-induced R-MA-MC-T symmetry changes in BiFeO3 films | | J.H. Nam
; H.S. Kim
; A. J. Hatt
; N. A. Spaldin
; H.M. Christen
; | | Date: |
1 Oct 2010 | | Abstract: | The recent discovery of a stress-induced structural phase transition in the
single-component perovskite BiFeO3 has revived interest in this lead-free
ferroelectric. The coexistence of different phases may lead to large
piezoelectric coefficients, a property typically associated with complex solid
solutions of lead-based perovskites. Here we report combined experimental and
computational results showing that the stress-induced phase transitions in
BiFeO3 follow the path of
rhombohedral(R)-to-monoclinic(MA)-to-monoclinic(MC)-to-tetragonal(T), where
both MC and T show highly enhanced c/a ratios. This R-MA-MC-T sequence is
otherwise observed only near morphotropic phase boundaries (MPBs) in lead-based
perovskites (i.e. near a compositionally induced phase instability), where it
is controlled by electric field, temperature, or composition. Our results
represent the first time that this evolution has been induced in a single
component system using strain alone, and show that substrate- imposed symmetry
lowering results in a similar phase instability as the proximity to a MPB in
solid solutions. | | Source: | arXiv, 1010.0254 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER