Anomalous structural distortion - a possible origin for the waking-up of the spontaneous polarization in ferroelectric HfO2

被引：5

作者：

Nittayakasetwat, Siri ^{[1
]}

Kita, Koji ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Engn, Dept Mat Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2021年 / 60卷 / 07期

关键词：

HfO2; Ferroelectric; Structural Analysis; Structural Distortion; Phase Transformation; Waking-up;

D O I：

10.35848/1347-4065/ac085c

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report that the waking-up of the spontaneous polarization (P (spon)) in ferroelectric (FE) HfO2 is related to the phase transformation driven by electric field cycling. We found an anomalous distortion, which is defined by the difference between in-plane and out-of-plane interplanar spacing induced in FE-HfO2 thin films. We further investigated and found that there is a relationship between the amount of the P (spon) that was woken up and the amount of distortion. Due to the distinctiveness of an electric field-driven phase transformation, we propose a concept of distortion as a possible origin that determines the waking-up of the P (spon) in FE-HfO2.

引用

页数：4

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