Direct Observation of Ferroelectric Domain Switching of BaTiO3 Using In-Situ Transmission Electron Microscopy

作者：Jo Kuy Jin; An Byeong Seon; Kim Tae Hoon; Cha Hyun Woo; Oh Jin Su; Lee Joon Hwan; Kim Mi Yang; Yang Cheol Woong^*

来源：Science of Advanced Materials, 2016, 8(12): 2281-2285.

DOI：10.1166/sam.2016.2871

• Multi-Layer Ceramic Capacitor (MLCC)
• Ferroelectric Domain Switching
• BaTiO3
• In-Situ TEM

Understanding the domain switching behavior is important for the design and fabrication of multi-layer ceramic capacitor (MLCC) devices. Although many studies on domain switching using bulk sized BaTiO3 (BTO) have been reported, studies of the actual device are scarce. In this study, the domain switching behavior in BTO was investigated in the actual MLCC device. The domain configuration was successfully confirmed by electron diffraction analysis and the domain switching of BTO was investigated using in-situ electrical biasing transmission electron microscopy. Reorientation of domains was observed under an external electrical field ranging between 0 and 140 kV/cm. At the initial state with no external electrical field, a 90 degrees a-a domain configuration was observed. As the applied voltage increased, some of the a-domains gradually disappeared and new c-domains with different polarization nucleated and grew, resulting in the formation of a 90 degrees a-c domain configuration. A nucleating mechanism of domain switching in the BTO of an actual MLCC device was suggested.

• 出版日期2016-12