Cycling Waveform Dependent Wake-Up and ON/OFF Ratio in Al₂O₃/Hf_0.5Zr_0.5O₂ Ferroelectric Tunnel Junction Devices.

ABSTRACT: The wake-up behavior and ON/OFF current ratio of TiN-Al₂O₃-Hf_0.5Zr_0.5O₂-W ferroelectric tunnel junction (FTJ) devices were investigated for different wake-up voltage waveforms. We studied triangular and square waves, as well as square pulse trains of equal or unequal voltage amplitudes for positive and negative polarities. We find that the wake-up behavior in these FTJ stacks is highly influenced by the field cycling waveform. A square waveform is observed to provide wake-up with the lowest number of cycles, concomitantly resulting in higher remnant polarization and a higher ON/OFF ratio in the devices, compared to a triangular waveform. We further show that wake-up is dependent on the number of cycles rather than the total time of the

SUBMITTER: Shajil Nair K 

PROVIDER: S-EPMC10064796 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature