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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：德国卡尔斯鲁厄工业大学
学位：博士
所在单位：材料科学与工程学院
学科：材料物理与化学. 微电子学与固体电子学
办公地点：辽宁省大连市高新园区凌工路2号
大连理工大学新三束实验室412
电子邮箱：zhoudayu@dlut.edu.cn
Wake-up effects in Si-doped hafnium oxide ferroelectric thin films
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论文类型：期刊论文
发表时间：2013-11-04
发表刊物：APPLIED PHYSICS LETTERS
收录刊物：SCIE、EI、Scopus
卷号：103
期号：19
ISSN号：0003-6951
摘要：Hafnium oxide based ferroelectric thin films have shown potential as a promising alternative material for non-volatile memory applications. This work reports the switching stability of a Si-doped HfO2 film under bipolar pulsed-field operation. High field cycling causes a "wake-up" in virgin "pinched" polarization hysteresis loops, demonstrated by an enhancement in remanent polarization and a shift of negative coercive voltage. The rate of wake-up is accelerated by either reducing the frequency or increasing the amplitude of the cycling field. We suggest de-pinning of domains due to reduction of the defect concentration at bottom electrode interface as origin of the wake-up. (C) 2013 AIP Publishing LLC.