Mapping ferroelectric fields reveals the origins of the coercivity distribution

Better techniques for imaging ferroelectric polarization would aid the development of new ferroelectrics and the refinement of old ones. Here we show how scanning transmission electron microscope (STEM) electron beam-induced current (EBIC) imaging reveals ferroelectric polarization with obvious, simply interpretable contrast. Planar imaging of an entire ferroelectric hafnium zirconium oxide (Hf0.5Zr0.5O2, HZO) capacitor shows an EBIC response that is linearly related to the polarization determined in situ with the positive-up, negative-down (PUND) method. The contrast is easily calibrated in MV/cm. The underlying mechanism is magnification-independent, operating equally well on micrometer-sized devices and individual nanoscale domains. Coercive-field mapping reveals that individual domains are biased “positive” and “negative”, as opposed to being “easy” and “hard” to switch. The remanent background E-fields generating this bias can be isolated and mapped. Coupled with STEM’s native capa..., , , # Data from: Mapping ferroelectric fields reveals the origins of the coercivity distribution

This dataset: [10.5061/dryad.8w9ghx3v5](https://doi.org/10.5061/dryad.8w9ghx3v5)

The corresponding article [1] is open-access in ACS Nano and can be found here: [10.1021/acsnano.4c04526](https://doi.org/10.1021/acsnano.4c04526).

This dataset contains raw data from nano-positive-up, negative-down (PUND) transport, and scanning transmission electron microscope (STEM) imaging experiments.

\[1] Ho Leung Chan, Shelby S. Fields, Yueyun Chen, Tristan P. O’Neill, Megan K. Lenox, William A. Hubbard, Jon F. Ihlefeld, and Brian C. Regan, ACS Nano **2024** *18* (31), 20380-20388 DOI: [10.1021/acsnano.4c04526](https://doi.org/10.1021/acsnano.4c04526)

## Description of the data and file structure

### Data Structure

The data is organized into the following folders and subfolders:

```
|- Data/
|  |- 20230703_EBIC/
|  |  |- 20230703_EBIC_1024/
|  |- 20230703_PUND/
|  |- 20230809_EBIC/
|  |  |- 20230809_E...

高性能铁电极化成像技术的进步，将助力新型铁电材料的研发与现有铁电材料的性能优化。本研究展示了扫描透射电子显微镜（STEM）电子束感应电流（EBIC）成像如何通过清晰且易于解读的衬度直观表征铁电极化。对完整铁电铪锆氧（Hf₀.₅Zr₀.₅O₂, HZO）电容器进行平面成像，所得EBIC响应与通过正向上负向下（PUND）方法原位测得的极化强度呈线性相关。该衬度可通过MV/cm单位轻松完成校准。其成像机制与放大倍率无关，可同时适用于微米级器件与单个纳米尺度畴结构。矫顽场测绘结果表明，单个畴的偏置状态分为"正"与"负"两类，而非传统认知中的"易翻转"与"难翻转"畴。可分离并成像产生该偏置的剩余背景电场。结合扫描透射电子显微镜（STEM）的固有性能…… # 数据集来源：Mapping ferroelectric fields reveals the origins of the coercivity distribution

本数据集：[10.5061/dryad.8w9ghx3v5](https://doi.org/10.5061/dryad.8w9ghx3v5)

对应文献[1]发表于《ACS Nano》且为开源获取版本，可通过以下链接获取：[10.1021/acsnano.4c04526](https://doi.org/10.1021/acsnano.4c04526)。

本数据集包含纳米尺度正向上负向下（PUND）输运实验与扫描透射电子显微镜（STEM）成像实验的原始数据。

[1] Ho Leung Chan、Shelby S. Fields、Yueyun Chen、Tristan P. O’Neill、Megan K. Lenox、William A. Hubbard、Jon F. Ihlefeld 与 Brian C. Regan，《ACS Nano》，2024年，第18卷第31期，20380-20388，DOI：[10.1021/acsnano.4c04526](https://doi.org/10.1021/acsnano.4c04526)

## 数据与文件结构说明
### 数据组织结构
本数据集按以下文件夹及子文件夹结构组织：

|- Data/
| |- 20230703_EBIC/
| | |- 20230703_EBIC_1024/
| |- 20230703_PUND/
| |- 20230809_EBIC/
| | |- 20230809_E...