Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session F02: Dielectric & Ferroic Oxides -- Structure, Phase Stability, and Competition I
11:15 AM–2:15 PM,
Tuesday, March 5, 2019
BCEC
Room: 107A
Sponsoring
Units:
DMP DCOMP
Chair: Jason Hoffman
Abstract: F02.00004 : Unconventional Stability of Subloop Behavior for Neuromorphic Computing in a Ferroelectric HfO2
12:15 PM–12:27 PM
Presenter:
KyoungJun Lee
(Physics Education, Seoul National University)
Authors:
KyoungJun Lee
(Physics Education, Seoul National University)
Seung Chul Chae
(Physics Education, Seoul National University)
In this study, we present the stability of multi-level polarization states in terms of large activation energy and small critical domain volume. We measured switching dynamics and temperature dependence hysteresis of HfO2 thin films. The characteristic switching time and temperature dependence of hysteresis showed that ferroelectric HfO2 has large activation energy while the critical ferroelectric domain volume is small compared to the conventional perovskite materials. PFM results showed large domain wall activation energy due to stable small critical volume. Due to small critical size of ferroelectric domain in HfO2, the enhanced accuracy for the access of multiple states can be used for the analogue ferroelectric HfO2 memory for the neuromorphic memory application.
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