Risultati di ricerca
There are many causes of the dead layer, and they may be classified into two categories: intermixing, which alters the chemical composition of the ferroelectric film, and interfacial relaxation, which occurs when the electrode and ferroelectric film relax together.
23 dic 2020 · In this study, we investigate the effects of various electrodes on the ferroelectric properties of ultrathin HfZrO x (HZO) films. The ferroelectric polarization is totally suppressed in the HZO films with TiN and W bottom electrodes when the film thickness is below 5 nm.
15 giu 2016 · An interface modification method has been adopted to remove such dead layer effects. Our results show that a LaXO 3 (X = Fe, Co) or YNiO 3 (Y = Sr, Ba) buffer layer can effectively remove the dead layer effect in BaTiO 3 film.
- Qiong Yang, Juexian Cao, Yichun Zhou, Lizhong Sun, Xiaojie Lou
- 2016
15 mag 2017 · The effects of a dead layer were taken into account in the P-E and C-V responses of the thin film considered as a heterostructure. This investigation can be used for every grown thin film to highlight the effective contribution of the thin film to the overall ferroelectric response.
- Y. Gagou, J. Belhadi, B. Asbani, M. El Marssi, J.-L. Dellis, Yu. I. Yuzyuk, I.P. Raevski, J.F. Scott
- 2017
22 lug 2002 · It was observed that the grain size decreased with decreasing thickness in a manner similar to the dielectric constant. Simple models were developed in which a functionally inferior layer at the grain boundary was considered as responsible for the observed dielectric behavior.
Here, we report atomic structure of the surface dielectric dead layer in BFO thin film and uncover associated order parameter changes occurring at the surface layer using quantitative aberration-corrected scanning transmission electron microscopy (STEM) combined with EELS.
intrinsic dead layer. In particular we argue that strain-gradients automatically arise in very thin films even in complete absence of external strain inducers and, due to flexoelectric coupling, are dominant contributors to the dead layer effect. Our theoretical results compare well with existing, as well as our own,
