铁电性
材料科学
退火(玻璃)
光电子学
非易失性存储器
晶体管
制作
电压
纳米技术
电介质
电气工程
复合材料
医学
工程类
病理
替代医学
作者
Solyee Im,Seok Hun Kang,Yeriaron Kim,Jeong Hun Kim,Jooyoung Im,Sung‐Min Yoon,Seoksu Moon,Jiyong Woo
出处
期刊:Micromachines
[MDPI AG]
日期:2020-09-30
卷期号:11 (10): 910-910
被引量:7
摘要
Since ferroelectricity has been observed in simple binary oxide material systems, it has attracted great interest in semiconductor research fields such as advanced logic transistors, non-volatile memories, and neuromorphic devices. The location in which the ferroelectric devices are implemented depends on the specific application, so the process constraints required for device fabrication may be different. In this study, we investigate the ferroelectric characteristics of Zr doped HfO2 layers treated at high temperatures. A single HfZrOx layer deposited by sputtering exhibits polarization switching after annealing at a temperature of 850 °C. However, the achieved ferroelectric properties are vulnerable to voltage stress and higher annealing temperature, resulting in switching instability. Therefore, we introduce an ultrathin 1-nm-thick Al2O3 layer at both interfaces of the HfZrOx. The trilayer Al2O3/HfZrOx/Al2O3 structure allows switching parameters such as remnant and saturation polarizations to be immune to sweeping voltage and pulse cycling. Our results reveal that the trilayer not only makes the ferroelectric phase involved in the switching free from pinning, but also preserves the phase even at high annealing temperature. Simultaneously, the ferroelectric switching can be improved by preventing leakage charge.
科研通智能强力驱动
Strongly Powered by AbleSci AI