About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Mesoscale Phenomena in Functional Polycrystals and Nanostructures
|
| Presentation Title |
D-14: Modeling Domain Wall Dynamics in Polydomain Ferroelectric BaTiO3 |
| Author(s) |
Ashok Gurung, M. Fatin Ishtiyaq, John Mangeri, S. Pamir Alpay, Serge Nakhmanson |
| On-Site Speaker (Planned) |
Ashok Gurung |
| Abstract Scope |
Barium Titanate (BaTiO3, BTO) is an attractive material due to its superior dielectric and optical properties at near room temperature operating conditions. However, the efficiency and usefulness of BTO is limited by its morphological makeup, including domain walls (DWs), which influence the dynamics of polarization response under applied AC fields. To elucidate the effects of DW presence on temperature and frequency dependent dielectric dispersion in BTO, we employed phase-field modeling based on Landau-Ginzburg theory. Our studies reveal that a 180-degree domain wall exhibits distinct dispersion characteristics absent within polar domains, enhancing the system dielectric response. DWs also influence the local sensitivity of dielectric dispersion to the applied field, including the height and central frequency of the loss peak. The improved understanding of DW dynamics in AC electric fields paves the way for low latency, agile DW-based applications in optics and electronics. |