| Enhanced polarization retention and softening in [001]-oriented Pb(Mg1/3Nb2/3)-PbTiO3 single crystals through corona poling |
Jeong-Woo Sun1,2, Woo-Jin Choi1, Hye-Lim Yu1, Sang-Goo Lee3, Jong Eun Ryu2, Temesgen Tadeyos Zate1, Wook Jo1
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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 |
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Received: November 8, 2023; Revised: February 27, 2024 Accepted: March 14, 2024. Published online: April 15, 2024. |
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| ABSTRACT |
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This study investigates the electrical properties of Pb(Mg1/3Nb2/3)-PbTiO3 (PMN-PT) single crystals subjected to corona poling (CorP) compared to direct current poling (DCP) and alternating current poling (ACP) methods. The results revealed the superiority of CorP in terms of polarization retention and softening. The corona-poled sample demonstrated a higher depolarization temperature (Td ~ 100 ℃) than DCP or ACP methods (Td ~ 90 ℃), indicating improved polarization stability at elevated temperatures. Furthermore, lowering of the coercive field (EC) in CorP samples suggests CorP makes the materials electrically softer. These advantages stem from the noncontact nature of the CorP method, which minimizes the risk of localized dielectric breakdown, and ensures a uniform electric field distribution. This work sheds a light on the potential of CorP as a promising technique for enhancing the electrical performance of materials in piezoelectric applications. |
| Key words:
Corona poling · Polarization retention · Depolarization temperature · Coercive field |
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