Wake-up effects in Si-doped hafnium oxide ferroelectric thin films
- School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024 (China)
- Department of Electronic Engineering, Dalian Neusoft University of Information, Dalian 116023 (China)
- Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China)
- Fraunhofer IPMS-CNT, Koengisbruecker Strasse 180, 01109 Dresden (Germany)
- Namlab gGmbH/TU Dresden, Noethnitzer Strasse 64, 01187 Dresden (Germany)
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 HfO{sub 2} 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.
- OSTI ID:
- 22254140
- Journal Information:
- Applied Physics Letters, Vol. 103, Issue 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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