About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Dielectric Materials and Electronic Devices
|
| Presentation Title |
Unlocking High Capacitive Energy-Density in Sm-Doped PMN-PT Thin Films |
| Author(s) |
Matjaž Spreitzer, Zouhair Hanani, Urška Trstenjak, Jamal Belhadi, Anna Razumnaya, Igor Lukyanchuk, Zdravko Kutnjak |
| On-Site Speaker (Planned) |
Matjaž Spreitzer |
| Abstract Scope |
Sm-doped Pb(Mg1/3Nb2/3)O3–PbTiO3 (Sm-PMN–PT) bulk materials have revealed outstanding ferroelectric and piezoelectric properties due to enhanced local structural heterogeneity. In this study, we further explore the potential of Sm-PMN–PT by fabricating epitaxial thin films, revealing that Sm doping significantly improves the capacitive energy-storage, piezoelectric, electrocaloric, and pyroelectric properties of PMN–PT thin films. These Sm-PMN–PT thin films exhibit fatigue free performance and maintain thermal stability across a wide temperature range. Notably, the films demonstrate a colossal electrocaloric effect with a temperature change of 59.4K, and a remarkable pyroelectric energy density reaching 40 J cm−3. By using scanning transmission electron microscopy and phase-field modeling, we revealed that these exceptional properties arise from the increased local structural heterogeneity and strong local electric fields along spontaneous polarization directions, which in turn facilitates the nucleation of polymorphic nanodomains characterized by a slush-like polar structure. |