| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
Thermodynamics Calculation and Phase-Field Simulation of Morphotropic Phase Boundary in (001) Bifeo3 Thin Films |
| Author(s) |
Guang Sheng, Jingxian Zhang, Robert Zeches, Jinxing Zhang, Alexander Melville, Jon Ihlefeld, Venkatraman Gopalan, Darrel G Schlom, Lane.W Martin, Ramamoorthy Ramesh, Zi-Kui Liu, Long-Qing Chen |
| On-Site Speaker (Planned) |
Guang Sheng |
| Abstract Scope |
A strain-driven morphotropic phase boundary was recently observed in (001)
BiFeO<SUB>3</SUB> thin film deposited on YAO and LAO substrates. In this
study, we constructed the strain-temperature phase stability diagram for
(001) BiFeO<SUB>3</SUB> thin film using both thermodynamic calculation and
phase-field simulations. The tetragonal to distorted rhombohedral phase
boundary predicted from thermodynamic analysis is consistent with the density
function calculations. The predicted strain diagram and experimental
observations are in very good agreement with BiFeO<SUB>3</SUB> films grown on
LAO and YAO with -4.29% and -6.8% strains respectively. The volume fraction
changes of different phases as a function of strain from phase-field
simulation across the morphotropic phase boundary will be also presented. |
| Proceedings Inclusion? |
Definite: A CD-only volume |