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Quantitative local probing of polarization with application on HfO 2 ‐based thin films
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Kwon, Owoong, Kang, Seunghun, Jo, Sanghyun, Kim, Yun Do, Han, Hee, Park, Yeehyun, Lu, Xiaoli, Lee, Woo, Heo, Jinseong, Alexe, Marin and Kim, Yunseok (2021) Quantitative local probing of polarization with application on HfO 2 ‐based thin films. Small Methods, 5 (11). 2100781. doi:10.1002/smtd.202100781 ISSN 2366-9608.
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WRAP-Quantitative-local-probing-polarization-application-HfO-2-based-thin-films-2021.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1630Kb) | Preview |
Official URL: https://doi.org/10.1002/smtd.202100781
Abstract
Owing to their switchable spontaneous polarization, ferroelectric materials have been applied in various fields, such as information technologies, actuators, and sensors. In the last decade, as the characteristic sizes of both devices and materials have decreased significantly below the nanoscale, the development of appropriate characterization tools became essential. Recently, a technique based on conductive atomic force microscopy (AFM), called AFM‐positive‐up‐negative‐down (PUND), is employed for the direct measurement of ferroelectric polarization under the AFM tip. However, the main limitation of AFM‐PUND is the low frequency (i.e., on the order of a few hertz) that is used to initiate ferroelectric hysteresis. A significantly higher frequency is required to increase the signal‐to‐noise ratio and the measurement efficiency. In this study, a novel method based on high‐frequency AFM‐PUND using continuous waveform and simultaneous signal acquisition of the switching current is presented, in which polarization–voltage hysteresis loops are obtained on a high‐polarization BiFeO3 nanocapacitor at frequencies up to 100 kHz. The proposed method is comprehensively evaluated by measuring nanoscale polarization values of the emerging ferroelectric Hf0.5Zr0.5O2 under the AFM tip.
Item Type: | Journal Article | ||||||||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry Q Science > QH Natural history |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||
SWORD Depositor: | Library Publications Router | ||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Atomic force microscopy, Ferroelectric crystals, Polarization (Electricity), Thin films -- Electric properties | ||||||||||||||||||
Journal or Publication Title: | Small Methods | ||||||||||||||||||
Publisher: | Wiley | ||||||||||||||||||
ISSN: | 2366-9608 | ||||||||||||||||||
Official Date: | November 2021 | ||||||||||||||||||
Dates: |
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Volume: | 5 | ||||||||||||||||||
Number: | 11 | ||||||||||||||||||
Article Number: | 2100781 | ||||||||||||||||||
DOI: | 10.1002/smtd.202100781 | ||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||
Date of first compliant deposit: | 28 October 2021 | ||||||||||||||||||
Date of first compliant Open Access: | 28 October 2021 | ||||||||||||||||||
RIOXX Funder/Project Grant: |
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