| Understanding thermal depolarization via thermally stimulated depolarization current measurement |
| Jeong-Woo Sun1,2, Temesgen Tadeyos Zate1, Woo-Jin Choi1, Geon-Ju Lee1, Sang-Goo Lee3, Jong Eun Ryu2, Wook Jo1 |
1Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea
2Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC, 27695, USA
3iBULe Photonics, Inc., 7-39, Songdo-dong, Yeonsu-gu, Incheon, 21999, Republic of Korea |
|
|
|
Received: November 8, 2023; Revised: February 27, 2024 Accepted: March 14, 2024. Published online: April 15, 2024. |
|
|
|
| ABSTRACT |
|
Thermal depolarization in poling-induced piezoelectric materials is defined as the disappearance of remanent polarization at a so-called depolarization temperature. A thermally stimulated depolarization current (TSDC) measurement is most widely used for examining depolarization as a function of temperature. TSDC results in the literature commonly show a gradual reduction of polarization even below depolarization temperature (Td). However, no degradation happens when thermal heat treatments are conducted below Td, meaning that the apparent reduction in polarization measured by TSDC is sure to be an artifact. Here, we demonstrate that such artifact is unavoidable during TSDC measurements and propose a method to circumvent it. This strategy was manifested on TSDC data collected from a relaxor ferroelectric Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) single crystals. |
| Key words:
Thermally stimulated depolarization current · Depolarization temperature · PMN-PT · Single crystal · Phase transformation |
|
|
|
PDF Links 
Full text via DOI
Download Citation 
